Some matchy ideas:
[name_f][/name_f][name_m]Billy[/name_m] & [name_f]Bonnie[/name_f]
[name_f][/name_f][name_m]Brody[/name_m] and [name_f]Blythe[/name_f]
[name_f][/name_f][name_m]Baker[/name_m] & [name_m]Baxter[/name_m]
[name_f][/name_f][name_m]Bryer[/name_m] & [name_f]Bloom[/name_f]
[name_f][/name_f][name_m]Boston[/name_m] & [name_f]Blakeley[/name_f]
[name_f][/name_f][name_m]Breccan[/name_m] & [name_f]Briony[/name_f]
[name_f][/name_f][name_m]Bruce[/name_m] & [name_f]Brontë[/name_f]
[name_f][/name_f]Brophy & [name_f]Brinkley[/name_f]
[name_f][/name_f][name_m]Beauden[/name_m] & [name_f]Beulah[/name_f]
[name_f][/name_f][name_m]Billy[/name_m] & [name_f]Bridie[/name_f]
More individual:
[name_f][/name_f][name_m]Beck[/name_m] & [name_f]Bonita[/name_f]
[name_f][/name_f][name_m]Beren[/name_m] & [name_f]Beatrice[/name_f]
[name_f][/name_f][name_m]Barnaby[/name_m] & [name_f]Beatrix[/name_f]
[name_f][/name_f][name_m]Bowie[/name_m] & [name_f]Birdie[/name_f]
[name_f][/name_f][name_m]Beau[/name_m] & [name_m]Billy[/name_m]
[name_f][/name_f][name_m]Bancroft[/name_m] & [name_f]Bernina[/name_f]
[name_f][/name_f][name_m]Braden[/name_m] & [name_f]Berry[/name_f]
[name_f][/name_f][name_m]Brian[/name_m] & [name_f]Blanche[/name_f]
[name_f][/name_f][name_m]Bertie[/name_m] & [name_f]Bella[/name_f]
[name_f][/name_f][name_m]Boris[/name_m] & [name_f]Babette[/name_f]
[name_f][/name_f]Brockman & [name_f]Bronte[/name_f]
[name_f][/name_f][name_m]Boothe[/name_m] & [name_m]Betony[/name_m]
[name_f][/name_f][name_m]Boone[/name_m] & [name_f]Brinley[/name_f]
I hope you get something out of these 