Hey everyone!
I’m worried that the names in ALL CAPITALS do not fit in with the sibsets.
[name_m]Jasper[/name_m] [name_u]James[/name_u], [name_m]Leo[/name_m] [name_m]Walton[/name_m], and [name_f]AVA[/name_f] [name_f]MAE[/name_f]
[name_m]Jasper[/name_m] [name_u]James[/name_u], [name_m]Leo[/name_m] [name_m]Walton[/name_m], and [name_f]OLIVIA[/name_f] [name_f]MAE[/name_f]
[name_m]Jasper[/name_m] [name_u]James[/name_u], [name_f]Lucy[/name_f] [name_f]Clementine[/name_f], and [name_f]AVA[/name_f] [name_f]MAE[/name_f]
[name_m]Jasper[/name_m] [name_u]James[/name_u], [name_f]Lucy[/name_f] [name_f]Clementine[/name_f], and [name_f]OLIVIA[/name_f] [name_f]MAE[/name_f]
Thanks in advance! 
I think all the sibsets you’ve listed above seem fine. They’re all names with a history of use that are popular/trendy right now. [name_m]Jasper[/name_m], [name_f]Lucy[/name_f] and [name_f]Olivia[/name_f] have a more classic feel, but [name_m]Leo[/name_m] has been popular in Europe for a long time and [name_f]Ava[/name_f] feels more vintage than it otherwise would due to [name_f]Ava[/name_f] [name_u]Gardner[/name_u]. I’d be more inclined to put [name_m]Jasper[/name_m], [name_m]Leo[/name_m] and [name_f]Ava[/name_f] together and [name_m]Jasper[/name_m], [name_f]Lucy[/name_f] and [name_f]Olivia[/name_f] together, since [name_m]Leo[/name_m] and [name_f]Ava[/name_f] are more towards the modern side and [name_f]Lucy[/name_f] and [name_f]Olivia[/name_f] more towards the classic, but any of them would work.
I think they all fit well, I prefer [name_f]Ava[/name_f] [name_f]Mae[/name_f] but [name_f]Olivia[/name_f] [name_f]Mae[/name_f] is fantastic too.
I think they go very well! I do prefer [name_f]Ava[/name_f] [name_f]Mae[/name_f] over [name_f]Olivia[/name_f] [name_f]Mae[/name_f], but [name_f]Olivia[/name_f] is also a very pretty choice 
While they do fit stylistically, they jump out as being sooooooo much more popular than the other siblings. I would keep looking.