[name_m]Hi[/name_m] there.
I love the name [name_u]Max[/name_u]! Great job there. Here are my thoughts for a little sister:
[name_f]Liv[/name_f]-[name_m]Even[/name_m] though I like [name_u]Max[/name_u], sometimes a nn, as a full name, [name_f]Liv[/name_f] seems too short. [name_u]Max[/name_u] & [name_f]Olive[/name_f] would be amazing! [name_f]Olivia[/name_f] is pretty too, but kind of popular & I love the spunkiness of [name_u]Max[/name_u] & [name_f]Olive[/name_f]. Then you could use the nn [name_f]Liv[/name_f] sometimes.
[name_f]Stella[/name_f]-I love this . It got my vote. It’s so smart, feminine & sassy. It’s simple, sort of common but not super duper over done, & goes really well w/[name_u]Max[/name_u] & your ln.
[name_u]Louise[/name_u]-This is lovely. It gets my second vote. It’s way more unexpected than the others on your list. It’s so sweet & a little quirky. And you could do the nn [name_f]Loulou[/name_f], which is adorable.
[name_f]Margaux[/name_f]-This is fine. I kind of see it a lot on this board, so I’m getting sick of it. It’s a nice name though.
[name_f]Loulou[/name_f]-I definitely prefer this as a nn. Actually, I kind of like [name_f]Lulu[/name_f]. It seems easier. [name_f]Loulou[/name_f]/[name_f]Lulu[/name_f] could be a nn for tons of names. [name_u]Louise[/name_u], of course, but also [name_f]Lucy[/name_f], [name_f]Louisa[/name_f], [name_f]Luisa[/name_f], [name_f]Lucille[/name_f], [name_f]Lucienne[/name_f], [name_f]Luciana[/name_f], Elosie, [name_f]Eloisa[/name_f], [name_f]Laurel[/name_f], [name_f]Lorelei[/name_f]?
[name_f]Margot[/name_f]-I like this spelling better. It looks spunkier.
[name_f]Mila[/name_f]-Pretty name, but very very trendy. A bit of a tongue twister w/your ln too.
[name_f]Hope[/name_f] this helps.