My husband doesn’t want to discuss names! The names of our three children are [name]Aaron[/name] [name]Joshua[/name] (AJ), [name]Kami[/name] [name]Lynn[/name], and [name]Lincoln[/name] [name]Graham[/name]. The first two were named after friends/family, but we chose the last because we just liked it. 
We won’t be finding out what gender we’re expecting, so I would love to have suggestions for both genders and would prefer a unique name with a different initial from the others.
[name]Emerson[/name], [name]Felix[/name], Thereon, [name]Marlon[/name], [name]Holden[/name], [name]Maddox[/name], [name]Tucker[/name], [name]Hunter[/name]
[name]Fern[/name], [name]Dahlia[/name], [name]Vesper[/name], [name]Eliza[/name], [name]Eris[/name], [name]Adia[/name], [name]Sage[/name], [name]Poppy[/name], [name]Daphne[/name]
Not sure if our taste are the same, but here are some of my favorite names.
Boys: [name]Barnabas[/name], [name]Gabriel[/name], Zolton, [name]Boaz[/name], [name]Lindsay[/name], [name]Ransome[/name], [name]Grove[/name], Oleksander, and [name]Ethan[/name]
Girls: [name]Esperance[/name], [name]Bay[/name], [name]Christopher[/name], [name]Calypso[/name], Xanna, Avalone, [name]Ridley[/name], [name]Juna[/name], [name]Isabeau[/name], Couture, and [name]Halcyon[/name]
Your taste in names is a little difficult to pin down. The boy names are very serious, well-worn names over history. Your girl name is more fun, light, and trendy. I guess I would maintain those styles for each gender.
For [name]Kami[/name]'s sister, I’d choose something like [name]Ainsley[/name].
For [name]Aaron[/name] and [name]Lincoln[/name]'s brither, I’d choose something like [name]Noah[/name].