How are these twin names?

I’m currently expecting twins, a boy and a girl and have come up with the following names:

[name_f]Sally[/name_f] [name_u]Rae[/name_u]
[name_m]Gabriel[/name_m] [name_m]William[/name_m]

It is yet to be decided if they will have the surname [name_m]Jackson[/name_m] or [name_u]Taylor[/name_u], although we’re swaying more towards [name_m]Jackson[/name_m]. Definitely want to keep [name_f]Sally[/name_f] in my daughters name but apart from that changes will be considered. [name_m]How[/name_m] are these names; any suggestions?

[name_f]Do[/name_f] these names have any personal meaning? I like [name_f]Sally[/name_f] a lot, but I think [name_f]Sally[/name_f] [name_f]Anne[/name_f] would be nicer. I really like [name_m]Gabriel[/name_m], but in my mind’s eye, A names go better with G names. [name_m]How[/name_m] about…

[name_m]Gabriel[/name_m] [name_m]Andrew[/name_m]
[name_m]Gabriel[/name_m] [name_m]Anthony[/name_m]
[name_m]Gabriel[/name_m] [name_m]Adam[/name_m]
[name_m]Gabriel[/name_m] [name_m]Aaron[/name_m]
[name_m]Gabriel[/name_m] [name_m]Arthur[/name_m]
[name_m]Gabriel[/name_m] [name_u]Aidan[/name_u]