Some that came to mind:
[name_f][/name_f][name_m]Ocean[/name_m] (used by explorer [name_f]Violet[/name_f] Cressy-Marcks back in the 1930s)
[name_f][/name_f][name_m]Forest[/name_m] (same as above)
[name_f][/name_f][name_m]Royal[/name_m]
[name_f][/name_f][name_m]Gardener[/name_m]
[name_f][/name_f][name_m]Crocket[/name_m]
[name_f][/name_f][name_f]Jewel[/name_f]
[name_f][/name_f][name_m]Author[/name_m]
[name_f][/name_f][name_m]Golden[/name_m]
[name_f][/name_f][name_m]Early[/name_m]
[name_f][/name_f][name_f]Delta[/name_f]
[name_f][/name_f][name_m]Octave[/name_m]