I love [name_m]Peter[/name_m] but, as a [name_u]Brit[/name_u], [name_f]Greta[/name_f] and [name_m]Peter[/name_m] almost rhyme to me, so that’s the only one I’d personally avoid. Less of an issue in the US, though!
I love [name_u]Asa[/name_u] and [name_m]Roman[/name_m], and both sound good with [name_f]Greta[/name_f].