Thank you all!
I updated the first post with the list I already compiled with many of your suggestions already included.
Please comment if I left out any important characters from certain books; I haven’t read them all so I only know what the internet tells me.
I will make one for international literature as well, though I’ll include books that are also famous in English in the first list.
And please keep it coming 
Čudnovate zgode šegrta Hlapića (Brave Adventures of Lapitch): Hlapić (Lapitch), [name_f]Gita[/name_f] (this is actually cute), Bundaš (the dog), Master Scowler, [name_m]Black[/name_m] [name_m]Man[/name_m]
[name_m]Emil[/name_m] and the Detectives: [name_m]Emil[/name_m], [name_u]Max[/name_u], [name_m]Gustav[/name_m], Pony
[name_f]Lottie[/name_f] and [name_u]Lisa[/name_u] (das doppelte Lotchen):
[name_f]Lottie[/name_f], [name_u]Lisa[/name_u], Lisalotte (their mom), [name_m]Ludwig[/name_m] (their dad), [name_f]Irene[/name_f]
Chronicles of [name_f]Narnia[/name_f]: Aslan, [name_m]Edmund[/name_m], [name_f]Lucy[/name_f], [name_m]Peter[/name_m], [name_f]Susan[/name_f], [name_m]Caspian[/name_m], [name_f]Polly[/name_f], Digory, [name_u]Jadis[/name_u], [name_m]Andrew[/name_m] (Digory’s uncle), [name_f]Jill[/name_f], [name_m]Eustace[/name_m] [name_m]Clarence[/name_m], [name_f]Alberta[/name_f] ([name_m]Eustace[/name_m]'s mom), [name_m]Harold[/name_m] ([name_m]Eustace[/name_m]'s dad)
Charlote’s [name_m]Web[/name_m]: [name_m]Wilbur[/name_m], [name_f]Fern[/name_f], [name_f]Charlotte[/name_f], [name_u]Avery[/name_u], [name_m]Henry[/name_m], [name_f]Joy[/name_f], Aranea, [name_f]Nellie[/name_f], [name_m]Homer[/name_m] & [name_f]Edith[/name_f] Zuckerman
[name_f]Betsy[/name_f]-[name_f]Tacy[/name_f] by [name_f]Maud[/name_f] [name_m]Hart[/name_m] Lovelace:
[name_f]Betsy[/name_f] ([name_f]Elizabeth[/name_f]); [name_f]Tacy[/name_f] ([name_f]Anastasia[/name_f]); Tib ([name_f]Thelma[/name_f]); [name_m]Cab[/name_m] ([name_m]Caleb[/name_m])
[name_u]Eloise[/name_u] by [name_u]Kay[/name_u] [name_m]Thompson[/name_m]: [name_u]Eloise[/name_u]
[name_f]Narnia[/name_f]: Lilliandil
[name_f]Beatrix[/name_f] [name_m]Potter[/name_m] Books: [name_m]Jeremy[/name_m], [name_m]Fisher[/name_m], [name_f]Jemima[/name_f], [name_m]Tommy[/name_m], [name_m]Brock[/name_m], [name_m]Jackson[/name_m], [name_m]Diggory[/name_m], Delvet, Kitten, [name_m]Tod[/name_m], [name_m]Johnny[/name_m], [name_m]Timmy[/name_m], [name_m]Robinson[/name_m], Amiable, Munca (I only included this one due to [name_f]Monica[/name_f]), [name_m]Samuel[/name_m], [name_f]Cecily[/name_f], Parsley, [name_u]Willie[/name_u], [name_f]Tabitha[/name_f], Goody, Grateful, [name_m]McGregor[/name_m], [name_m]Tom[/name_m], Lady
Pauline, Petrova, and Posy Fossil and Sylvia Brown from Ballet Shoes, and Sorrel, Mark, and Holly Forbes from Theater Shoes.
Artemis and Angeline Fowl, Holly Short, and Juliet Butler from the Artemis Fowl series.
Gwendolen, Eric Emelius, Janet, Christopher, and Julia Chant from Charmed Life.
Sylvie, Joey, Janey, and Rufus Moffat from The Moffats.
Lina and Poppy Mayfleet, Doon Harrow, Althea Tower, Nickie Randolph from the City of Ember series.
Jesse/Jess Aarons and Leslie Burke from Bridge to Terabithia.
Roy Eberhardt, Beatrice Leep, Napoleon Bridger from Hoot.
Silas, Simon, Jo-Jo, Edd, Erik, Nickolas/Nicko, Septimus, Jenna, and Zelda Heap, Marcia Overstrand, Snorri Snorrelssen, Merrin Meredith, Marcellus Pye, Mandy Marwick, Julius Pike, Syrah Syara, Tertius Fume, Morwenna Mould, and Lucy Gringe from the Septimus Heap series.
Katniss and Primrose Everdeen, Peeta Mellark, Gale Hawthorne, Effie Trinket, Finnick Odair from the Hunger Games series.
Mandie Shaw, Joe Woodard, Celia Hamilton from the Mandie series.
Cimorene, Kazul, Telemain, Morwen, Mendanbar, Alianora, Daystar, Shiara, Antorell from the Enchanted Forest Chronicles.
Anthony from Strega Nona.
Luke Garner, Jen Talbot, Nina Idi/Elodie Luria, Matthias, Percy, Alia from the Shadow Children series.
Martin, Matthias, Mattimeo, Cornflower, Basil, Cluny, Methuselah, Rollo, Mariel Gullwhacker, Dandin, Tarquin, Joseph, Rakkety Tam MacBurl, Triss from the Redwall series.
Perseus Jackson, Annabeth Chase, Thalia Grace, Bianca di Angelo, Rachel Dare, Leo Valdez, Piper McLean, Jason Grace, Hazel Levesque, Frank Zhang from the Percy Jackson and Heroes of Olympus series.
Jack, Annie, Morgan, Kathleen, Teddy from the Magic Tree House series.
Fritz, Ernest, Jack, Franz from The Swiss Family Robinson.
Jim Hawkins from Treasure Island.
Mary Poppins, Bert, and George, Jane, Michael, John, Barbara, and Annabel Banks from the Mary Poppins books.
[name_f]Claudia[/name_f]— The Mixed-Up Files of Mrs. [name_m]Basil[/name_m] E. Frankweiler
[name_f]Ella[/name_f]—[name_f]Ella[/name_f] Enchanted
[name_f]Francie[/name_f]—A Tree Grows in [name_u]Brooklyn[/name_u]
[name_f]Posy[/name_f]— Ballet Shoes
[name_u]Scout[/name_u]— To Kill a Mockingbird
[name_f]Sylvie[/name_f]—The Moffats
[name_f]Wendy[/name_f]—[name_m]Peter[/name_m] [name_m]Pan[/name_m]
[name_f]Annika[/name_f]—[name_f]Pippi[/name_f] Longstocking
[name_f]Arrietty[/name_f]—The Borrowers
[name_f]Coraline[/name_f]—[name_f]Coraline[/name_f]
[name_f]Winnie[/name_f]—[name_m]Tuck[/name_m] Everlasting
[name_f]Amelia[/name_f]—[name_f]Amelia[/name_f] [name_f]Bedelia[/name_f]
[name_f]Ginny[/name_f] and Hermoine—[name_m]Harry[/name_m] [name_m]Potter[/name_m]
[name_f]Angelina[/name_f]—[name_f]Angelina[/name_f] Ballerina
[name_f]Miri[/name_f], [name_f]Britta[/name_f], [name_m]Esa[/name_m], [name_f]Liana[/name_f]—[name_f]Princess[/name_f] Academy
[name_f]Charlotte[/name_f]—The [name_u]True[/name_u] Confessions of [name_f]Charlotte[/name_f] [name_m]Doyle[/name_m]
[name_u]Abilene[/name_u], [name_f]Lettie[/name_f], [name_f]Ruthanne[/name_f]—Walk Two Moons
[name_f]Caddie[/name_f]—[name_f]Caddie[/name_f] Woodlawn
[name_f]Katherine[/name_f] “[name_u]Kit[/name_u]”—The Witch of Blackbird Pond
[name_f]Fiona[/name_f]—The Giver
[name_u]Billie[/name_u] [name_u]Jo[/name_u]—Out of the Dust
[name_f]Raffaela[/name_f], [name_f]Jessa[/name_f]—On the Jellicoe Road
[name_f]Maya[/name_f]—I Know Why the Caged Birds [name_m]Sing[/name_m]
[name_u]Vivian[/name_u]—Orphan Train
[name_u]Jem[/name_u]— To Kill a Mockingbird
[name_m]Milo[/name_m]—The Phantom Tollbooth
[name_m]Hugo[/name_m]—The Invention of [name_m]Hugo[/name_m] Cabret
[name_u]Robin[/name_u]—[name_u]Robin[/name_u] Hood
[name_m]Stuart[/name_m]—[name_m]Stuart[/name_m] [name_m]Little[/name_m]
[name_m]Elmer[/name_m]—My Father’s Dragon
[name_u]Jess[/name_u]—[name_m]Bridge[/name_m] to Terabithia
[name_m]Calvin[/name_m]—A Wrinkle in Time
[name_m]Crispin[/name_m]— [name_m]Crispin[/name_m]: The [name_m]Cross[/name_m] of Lead
[name_m]Eben[/name_m]—The [name_u]Seven[/name_u] Wonders of Sassafras Springs
[name_m]Jonas[/name_m], [name_m]Asher[/name_m]—The Giver
[name_m]Jonah[/name_m]—On the Jellicoe Road
[name_m]Matteo[/name_m]—The House of the Scorpion
Sorry for any repeats. Best of luck.
Thank you, I’ll add them to the lists.
For anyone interested and willing to help me out, would you go through the lists and look for books/names I’ve missed?
Those lists are wonderful! There’s a few you seem to be missing a bit of though.
I think you might be missing a bit of [name_f]Enid[/name_f] Blyton:
The [name_u]Magic[/name_u] Faraway Tree: [name_u]Jo[/name_u] (b), [name_f]Fanny[/name_f], [name_f]Bessie[/name_f]
St. [name_u]Clare[/name_u]'s: [name_f]Patricia[/name_f] ([name_u]Pat[/name_u]), [name_f]Isabel[/name_f], [name_f]Alison[/name_f], [name_u]Hilary[/name_u], [name_f]Carlotta[/name_f], [name_f]Janet[/name_f], [name_f]Doris[/name_f], [name_f]Kitty[/name_f], [name_f]Angela[/name_f], [name_f]Alma[/name_f], [name_f]Elsie[/name_f], [name_f]Gladys[/name_f], [name_f]Mirabel[/name_f], [name_f]Anne[/name_f]-[name_f]Marie[/name_f], [name_f]Claudine[/name_f], [name_f]Antoinette[/name_f], [name_f]Roberta[/name_f] ([name_u]Bobby[/name_u]), [name_f]Winifred[/name_f], [name_f]Tessie[/name_f], [name_f]Margery[/name_f], [name_f]Lucy[/name_f], [name_f]Erica[/name_f], [name_f]Priscilla[/name_f], [name_u]Joan[/name_u]
I’d also include Swallows and Amazons: [name_m]John[/name_m], [name_f]Susan[/name_f], Titty/[name_f]Kitty[/name_f]/Tatty, [name_m]Roger[/name_m], [name_f]Bridget[/name_f] ([name_f]Vicky[/name_f]), [name_f]Ruth[/name_f] ([name_f]Nancy[/name_f]), [name_f]Margaret[/name_f] ([name_f]Peggy[/name_f]), [name_u]James[/name_u]
Your collection seems slightly more leaning towards the classics, but I think, from an English perspective, it would be remiss not to include these more modern children’s books:
[name_u]Alex[/name_u] [name_m]Rider[/name_m]:
[name_u]Alex[/name_u] [name_m]Rider[/name_m], [name_m]Ben[/name_m] [name_m]Daniels[/name_m] ([name_m]Fox[/name_m]), [name_m]Jack[/name_m] Starbright (g), [name_f]Tulip[/name_f] [name_m]Jones[/name_m], [name_f]Tamara[/name_f] [name_m]Knight[/name_m], [name_f]Sabina[/name_f] Pleasure, [name_m]Ian[/name_m] [name_m]Rider[/name_m], Smithers,
Saffy’s [name_u]Angel[/name_u] series: [name_f]Saffron[/name_f] (Saffy), [name_f]Sarah[/name_f], [name_u]Indigo[/name_u] ([name_f]Indy[/name_f], b), Permanent [name_f]Rose[/name_f] ([name_f]Rosy[/name_f] Pose), Cadmium (Caddy, g), [name_f]Eve[/name_f], [name_m]Bill[/name_m], [name_u]Michael[/name_u]
The Wolves of [name_u]Willoughby[/name_u] [name_u]Chase[/name_u]: [name_f]Bonnie[/name_f], [name_f]Sylvia[/name_f], [name_f]Jane[/name_f], [name_f]Letitia[/name_f], [name_f]Gertrude[/name_f], [name_f]Diana[/name_f], [name_m]Josiah[/name_m], Pattern (g), [name_u]James[/name_u], [name_m]Simon[/name_m], [name_f]Lucy[/name_f], [name_f]Emma[/name_f], [name_f]Alice[/name_f], [name_m]Gabriel[/name_m], Sir [name_u]Willoughby[/name_u]
[name_f]Eva[/name_f] Ibbotson:
[name_f]Journey[/name_f] to the [name_u]River[/name_u] Sea: [name_f]Maia[/name_f], [name_m]Clovis[/name_m]/[name_m]Jimmy[/name_m] (b), [name_u]Finn[/name_u], [name_f]Beatrice[/name_f], [name_f]Gwendolyn[/name_f], [name_f]Arabella[/name_f] ([name_f]Bella[/name_f], [name_f]Minty[/name_f]), [name_m]Sergei[/name_m], [name_f]Olga[/name_f]
And a bit of [name_f]Lauren[/name_f] Child:
[name_f]Clarice[/name_f] [name_m]Bean[/name_m] series: [name_f]Clarice[/name_f] [name_m]Bean[/name_m] [name_f]Tuesday[/name_f], Minal [name_f]Cricket[/name_f] [name_f]Tuesday[/name_f], [name_f]Marcie[/name_f] [name_f]Tuesday[/name_f], [name_m]Kurt[/name_m] [name_f]Tuesday[/name_f], [name_f]Betty[/name_f] [name_m]Moody[/name_m], [name_m]Robert[/name_m] [name_m]Granger[/name_m], [name_f]Suzie[/name_f] Woo, [name_u]Ruby[/name_u] Redfort, [name_m]Karl[/name_m] Wrenbury, [name_f]Grace[/name_f] Grapello, [name_u]Quincy[/name_u]
[name_m]Hubert[/name_m] [name_m]Horatio[/name_m] Bartle Bobton-[name_m]Trent[/name_m]: [name_m]Hubert[/name_m] [name_m]Horatio[/name_m] Bartle Bobton-[name_m]Trent[/name_m] (H) and [name_m]Stanton[/name_m] Harcourt [name_m]Saint[/name_m] [name_m]Bernard[/name_m] III
OH I just remembered some more from my childhood just now
The Best [name_u]Christmas[/name_u] Pageant [name_u]Ever[/name_u] (I think it’s also called "The Worst Kids In The World depending on your country): [name_f]Imogene[/name_f], [name_f]Alice[/name_f], [name_f]Louella[/name_f], [name_u]Ollie[/name_u], [name_u]Charlie[/name_u], [name_f]Gladys[/name_f], [name_u]Claude[/name_u], [name_m]Ralph[/name_m], [name_m]Leroy[/name_m], [name_f]Beth[/name_f]
Encyclopedia [name_m]Brown[/name_m]: [name_m]Leroy[/name_m], [name_m]Wilford[/name_m], [name_f]Sally[/name_f], [name_u]Charlie[/name_u]
The [name_u]Magic[/name_u] Tree House: [name_u]Morgan[/name_u], [name_m]Merlin[/name_m], [name_m]Jack[/name_m], [name_f]Annie[/name_f]