Sister/Brother for Charlotte and Riley Anne

Name Advice
1

My stepmum is expecting a set of boy/girl twins, and we are looking for names. So far:
[name]William[/name] and [name]Delaney[/name]
[name]Henry[/name] and [name]Piper[/name]
[name]Thomas[/name] and [name]Elizabeth[/name]
[name]Alexander[/name] and [name]Amelia[/name]
[name]Lucas[/name] ([name]Luke[/name]) and [name]Amelia[/name]
[name]Oliver[/name] and [name]Piper[/name]
[name]Bennett[/name] and [name]Emilia[/name]
[name]Andrew[/name] and [name]Caroline[/name]
[name]Henry[/name] and [name]Cora[/name]
any thoughts? My name is [name]Riley[/name] [name]Anne[/name] and my sister is [name]Charlotte[/name].

2

[name]Aurora[/name] for the girl twin (nickname [name]Rory[/name]). For the boy twin, I would go with a masculine name like [name]Noah[/name], [name]Henry[/name], or [name]Adam[/name].

3

1 [name]Lucas[/name] and [name]Amelia[/name]
2 [name]Thomas[/name] and [name]Elizabeth[/name]
3 [name]Henry[/name] and [name]Cora[/name]

Question: Are you, [name]Riley[/name] [name]Anne[/name], a lot older than [name]Charlotte[/name] or are you and your sister pretty close in age?

4

[name]Mischa[/name]: I am 14 and [name]Charlotte[/name] is 9