Something strong or romantic that can be shortened to a one syllable nickname.
[name_m]Romaric[/name_m] “Rom” “Rick” “Omar”
How about:
[name_m]Nathaniel[/name_m] - [name_m]Nate[/name_m]
[name_m]Timothy[/name_m] - [name_m]Tim[/name_m]
[name_m]Roman[/name_m] / [name_m]Romeo[/name_m] - [name_m]Rome[/name_m]
[name_m]Lawrence[/name_m] - [name_m]Lars[/name_m]
[name_m]Christian[/name_m] - [name_m]Chris[/name_m] / [name_m]Kit[/name_m]
[name_m]Zachary[/name_m] / [name_m]Zachariah[/name_m] - [name_m]Zac[/name_m]
[name_m]Andrew[/name_m] - [name_m]Drew[/name_m]
[name_m]Jonathan[/name_m] - [name_m]John[/name_m]
[name_m]Thomas[/name_m] - [name_m]Tom[/name_m]
[name_m]Benjamin[/name_m] / [name_m]Benedict[/name_m] / [name_m]Benson[/name_m] - [name_m]Ben[/name_m]
[name_m]Curtis[/name_m] - [name_m]Curt[/name_m]
[name_m]Jameson[/name_m] - [name_m]James[/name_m]
[name_m]Gabriel[/name_m] - [name_m]Gabe[/name_m]
[name_m]Colton[/name_m] / [name_m]Colby[/name_m] - [name_m]Cole[/name_m]
[name_m]Bradley[/name_m] - [name_m]Brad[/name_m]
[name_m]Simon[/name_m] - [name_m]Si[/name_m]
[name_m]Clayton[/name_m] - [name_m]Clay[/name_m]
[name_m]Ezekial[/name_m] - [name_m]Zeke[/name_m]
[name_m]Jacob[/name_m] - [name_m]Jake[/name_m]
[name_m]Samuel[/name_m] / [name_m]Samson[/name_m] - [name_m]Sam[/name_m]
[name_m]Lucas[/name_m] - [name_m]Luke[/name_m]
[name_m]Jackson[/name_m] - [name_m]Jack[/name_m]
[name_m]Tyler[/name_m] / [name_m]Tyson[/name_m] - [name_m]Ty[/name_m]
[name_m]Nicholas[/name_m] / [name_m]Nikolai[/name_m] / [name_m]Dominic[/name_m] - [name_m]Nick[/name_m]
[name_m]Jason[/name_m] - [name_m]Jace[/name_m]
[name_m]Marcus[/name_m] - [name_m]Mark[/name_m]
[name_m]Charles[/name_m] - [name_m]Chuck[/name_m] / [name_m]Chip[/name_m]
[name_m]Raphael[/name_m] - [name_m]Rafe[/name_m]
[name_m]Oscar[/name_m] - [name_m]Oz[/name_m]
[name_f]Marlow[/name_f] / [name_f]Marley[/name_f] / Marsten - [name_m]Mars[/name_m]
[name_m]Joseph[/name_m] - [name_m]Seth[/name_m]
[name_m]Malachi[/name_m] - [name_m]Mal[/name_m] / [name_m]Kai[/name_m]
As well as “Lee” which will work for an endless number of names eg. [name_m]Leland[/name_m], [name_f]Ashley[/name_f], [name_m]Oliver[/name_m], [name_m]Eli[/name_m], [name_m]Bradley[/name_m], [name_m]Leon[/name_m], [name_m]Leo[/name_m], [name_m]Leonardo[/name_m], [name_m]Leroy[/name_m], [name_m]Finley[/name_m], [name_f]Harley[/name_f], [name_m]Lennox[/name_m], [name_m]Charlie[/name_m], [name_m]Oakley[/name_m], [name_m]Elias[/name_m], [name_m]Leander[/name_m], [name_m]Stanley[/name_m] etc.
Some I like:
[name_m]Peregrine[/name_m] nn [name_m]Pip[/name_m]
[name_m]Taliesin[/name_m] nn Tez or [name_m]Tenn[/name_m]
[name_m]Caspian[/name_m] nn [name_m]Cas[/name_m] or [name_m]Cap[/name_m]
[name_m]Ignatius[/name_m] nn [name_m]Nate[/name_m] or [name_m]Nash[/name_m]
[name_m]Ozias[/name_m] nn [name_m]Oz[/name_m] or Zi
[name_m]Isidore[/name_m] nn [name_m]Sid[/name_m]
[name_m]Valentine[/name_m] nn [name_m]Len[/name_m] or [name_m]Vann[/name_m]
[name_m]Benvolio[/name_m] nn [name_m]Ben[/name_m] or [name_m]Bo[/name_m]
Augustine/Augustus nn [name_m]Gus[/name_m]
I LOVE [name_m]Gus[/name_m] for a little boy, but couldn’t convince my husband because my cousin’s dog is named [name_m]Gus[/name_m]. 
[name_m]August[/name_m] nn [name_m]Gus[/name_m] is our top pick.
[name_m]Aizen[/name_m] - [name_m]Zen[/name_m]
[name_m]Alaric[/name_m] - [name_m]Al[/name_m] or [name_m]Ric[/name_m]
[name_m]Alexander[/name_m] - [name_m]Al[/name_m] or [name_m]Lex[/name_m]
[name_m]Alucard[/name_m] - [name_m]Al[/name_m] or [name_m]Luc[/name_m]
[name_m]Apollo[/name_m] - [name_m]Paul[/name_m]
[name_m]Arthur[/name_m] - [name_m]Arch[/name_m] or [name_m]Art[/name_m]
[name_f]Ashby[/name_f] - [name_m]Ash[/name_m]
[name_m]Aurelien[/name_m] - Ray/Rey
[name_m]Barrett[/name_m] - [name_m]Bear[/name_m] or [name_m]Rhett[/name_m]
[name_f]Brooklyn[/name_f] - [name_m]Brooks[/name_m] or [name_f]Bryn[/name_f]
[name_m]Caledon[/name_m] - [name_m]Cal[/name_m] or [name_m]Don[/name_m]
[name_m]Cassander[/name_m] - [name_m]Cas[/name_m]
[name_m]Christopher[/name_m] - [name_m]Kit[/name_m] or [name_m]Chris[/name_m]
[name_m]Crispin[/name_m] - [name_m]Chris[/name_m] or [name_m]Kip[/name_m] or [name_m]Penn[/name_m]
[name_m]Crusoe[/name_m] - [name_m]Cru[/name_m] or [name_m]Crow[/name_m]
[name_m]Dashiell[/name_m] - [name_m]Dash[/name_m]
[name_m]Deacon[/name_m] - [name_m]Deke[/name_m]
[name_m]Draco[/name_m] - [name_m]Drake[/name_m]
[name_m]Emeric[/name_m] - [name_m]Ric[/name_m]
[name_m]Evander[/name_m] - [name_m]Van[/name_m]
[name_m]Felix[/name_m] - [name_m]Fox[/name_m]
[name_m]Gideon[/name_m] - [name_m]Dean[/name_m]
[name_m]Granger[/name_m] - [name_m]Gray[/name_m]
[name_m]Gregory[/name_m] - [name_m]Greg[/name_m] or [name_m]Gus[/name_m]
[name_m]Harrison[/name_m] - [name_m]Hal[/name_m] or [name_m]Hank[/name_m]
[name_m]Haskell[/name_m] - [name_m]Hal[/name_m] or Kell or [name_m]Huck[/name_m]
[name_m]Hastings[/name_m] - [name_m]Hayes[/name_m]
[name_m]Hawthorne[/name_m] - [name_m]Hawk[/name_m] or [name_m]Thor[/name_m] or [name_m]Thorne[/name_m]
[name_m]Huckleberry[/name_m] - [name_m]Huck[/name_m] or [name_m]Bear[/name_m]
[name_m]Huxley[/name_m] - [name_m]Hux[/name_m] or [name_m]Huck[/name_m]
[name_m]Ivan[/name_m] - [name_m]Van[/name_m]
[name_m]Jeremy[/name_m] - [name_m]Jem[/name_m]
[name_m]Jethro[/name_m] - [name_m]Jett[/name_m] or [name_m]Joe[/name_m]
[name_m]Julien[/name_m] - [name_m]Jude[/name_m]
[name_m]Kipling[/name_m] - [name_m]Kip[/name_m]
Lukai - [name_m]Luke[/name_m] or [name_m]Kai[/name_m]
[name_m]Maxwell[/name_m] - [name_m]Max[/name_m] or [name_m]Wells[/name_m]
Metric, - [name_m]Mack[/name_m] or [name_m]Rick[/name_m]
[name_m]Miller[/name_m] - [name_m]Mills[/name_m]
Monterey - [name_f]Rey[/name_f]
[name_m]Nixon[/name_m] - [name_m]Nick[/name_m] or [name_f]Nix[/name_f]
[name_m]Omar[/name_m] - [name_m]Mars[/name_m]
[name_m]Paladin[/name_m] - [name_m]Pal[/name_m] or [name_m]Lad[/name_m] or [name_m]Pan[/name_m] or [name_m]Penn[/name_m]
[name_m]Peregrine[/name_m] - [name_m]Penn[/name_m]
[name_m]Poseidon[/name_m] - [name_m]Poe[/name_m] or [name_m]Sy[/name_m] or [name_m]Don[/name_m]
[name_m]Powell[/name_m] - [name_m]Poe[/name_m] or [name_m]Wells[/name_m]
[name_m]Redford[/name_m] - [name_m]Red[/name_m] or [name_m]Ford[/name_m]
[name_m]Rexford[/name_m] - [name_m]Rex[/name_m] or [name_m]Ford[/name_m]
[name_m]Rockwell[/name_m] - [name_m]Wells[/name_m]
[name_m]Sebastian[/name_m] - Bash or [name_m]Seb[/name_m]
Serephin - [name_m]Finn[/name_m]
[name_m]Shepherd[/name_m] - [name_m]Shep[/name_m]
[name_m]Soren[/name_m] - [name_m]Ren[/name_m]
[name_m]Taggart[/name_m] - [name_m]Tag[/name_m]
[name_m]Talmadge[/name_m] - [name_m]Tal[/name_m] or [name_m]Taz[/name_m]
Tamarlane - [name_m]Lane[/name_m]
Tazodor - [name_m]Taz[/name_m] or [name_m]Tor[/name_m]
Telluride - Tell or [name_m]Tide[/name_m]
[name_m]Tenzin[/name_m] - Ten or [name_m]Zen[/name_m]
[name_m]Theodore[/name_m] - [name_m]Ted[/name_m] or [name_m]Thor[/name_m]
[name_m]Tiberius[/name_m] - [name_m]Ty[/name_m]
[name_m]Truman[/name_m] - [name_f]True[/name_f]
Tryggve - Tryg
Whitlock - [name_m]Whit[/name_m]
Zajac - [name_m]Jac[/name_m]
Zeben - [name_m]Zeb[/name_m] or [name_m]Ben[/name_m]
Zokai - [name_m]Kai[/name_m]
[name_m]Zuko[/name_m] - Zuke