We already have [name_u]Noah[/name_u] [name_m]Alexander[/name_m] and are expecting in 7 weeks.
[name_m]Don[/name_m]'t know gender but we know the middle name will be [name_u]Sinclair[/name_u] regardless of gender. It’s a family name.
some thoughts:
[name_u]James[/name_u]
[name_m]Oscar[/name_m]
[name_m]Jacob[/name_m]
[name_m]Theodore[/name_m]
[name_m]Sebastian[/name_m]
[name_u]Jules[/name_u] (too girly?)
[name_u]Jem[/name_u] (short for [name_m]Jeremy[/name_m] but too girly?)
[name_m]Jasper[/name_m]
[name_f]Phoebe[/name_f]
[name_f]Violet[/name_f]
…not much for girls yet
These names are more traditional but we have no preference and are interesting in something less common.
From the choices you have I like [name_m]Theodore[/name_m] [name_u]Sinclair[/name_u], [name_m]Jasper[/name_m] [name_u]Sinclair[/name_u] and [name_f]Violet[/name_f] [name_u]Sinclair[/name_u].
Suggestions
Boys
[name_m]Walter[/name_m] [name_u]Sinclair[/name_u]
[name_m]Ronan[/name_m] [name_u]Sinclair[/name_u]
[name_m]Adam[/name_m] [name_u]Sinclair[/name_u]
[name_m]Lachlan[/name_m] [name_u]Sinclair[/name_u]
[name_m]Eli[/name_m] [name_u]Sinclair[/name_u]
[name_m]Henry[/name_m] [name_u]Sinclair[/name_u]
Girls
[name_f]Juliet[/name_f] [name_u]Sinclair[/name_u]
[name_f]Lily[/name_f] [name_u]Sinclair[/name_u]
[name_f]Evangeline[/name_f] [name_u]Sinclair[/name_u]
[name_f]Iris[/name_f] [name_u]Sinclair[/name_u]
[name_f]Matilda[/name_f] [name_u]Sinclair[/name_u]
[name_f]Rose[/name_f] [name_u]Sinclair[/name_u]
Firstly, congrats! Secondly, wow, [name_u]Sinclair[/name_u] is a wonderful for both genders that I had never even considered and with the family connections for you it is even better!
From your choices, I love [name_m]Jeremy[/name_m] [name_u]Sinclair[/name_u] “[name_u]Jem[/name_u]” as it sounds so strong and sophisticated yet playful. I adore [name_u]Jem[/name_u] as a nn for [name_m]Jeremy[/name_m], I’ve wanted to name a son of my own that since I read to kill a mocking bird in my teens! (Unfortunately my husband already used [name_m]Jeremiah[/name_m] as a mn for his son so it’s out for us now). I wish I could be of more use to you and suggest some boys names, but I really think you’ve hit the jackpot with [name_m]Jeremy[/name_m] [name_u]Sinclair[/name_u]. Beautiful.
I also love both [name_f]Phoebe[/name_f] and [name_f]Violet[/name_f] with the mn [name_u]Sinclair[/name_u]; both names add a strong yet feminine touch to the unisex middle name. Other girls names I would suggest for you would be [name_f]Maya[/name_f], [name_f]Lilith[/name_f], [name_f]Lillian[/name_f], [name_f]Zara[/name_f] and [name_f]Eliza[/name_f].
I wish I had a family name like [name_u]Sinclair[/name_u]!
[name_m]Jasper[/name_m] [name_u]Sinclair[/name_u] is the only one I like from your list. [name_u]Jules[/name_u] will forever be a girl’s name to me thanks to the shows Psych & Flashpoint.
What about:
[name_m]Ezra[/name_m] [name_u]Sinclair[/name_u]
[name_u]Jude[/name_u] [name_u]Sinclair[/name_u]
[name_m]Leo[/name_m] [name_u]Sinclair[/name_u]
[name_m]Lucas[/name_m] [name_u]Sinclair[/name_u]
[name_f]Dahlia[/name_f] [name_u]Sinclair[/name_u]
[name_f]Helena[/name_f] [name_u]Sinclair[/name_u]
[name_f]Juliet[/name_f] [name_u]Sinclair[/name_u] nn [name_u]Jules[/name_u]
[name_f]Madeleine[/name_f] [name_u]Sinclair[/name_u]
I think [name_m]Jasper[/name_m] goes the best with [name_u]Sinclair[/name_u], but [name_u]Jules[/name_u] is my personal favorite name from your boys’ list. However, [name_u]Jules[/name_u] [name_u]Sinclair[/name_u] kind of bleeds together since [name_u]Jules[/name_u] ends with the same letter [name_u]Sinclair[/name_u] starts with. You could use [name_m]Julian[/name_m]/[name_m]Julien[/name_m] instead (with [name_u]Sinclair[/name_u], I prefer the [name_m]Julien[/name_m] spelling) and use [name_u]Jules[/name_u] as a nickname.