I’m sorry, but I agree with samtay. I think they’re too close for siblings sound-wise (though stylistically almost too different).
[name_m]The[/name_m] sounds are kinda like having a [name_f]Georgie[/name_f] and [name_f]Georgia[/name_f]. [name_m]Not[/name_m] that bad, but still similar enough that I wouldn’t use them.