From your list, my favourite combos would be:
[name_f][/name_f][name_m]Abner[/name_m] [name_m]John[/name_m], [name_m]Amias[/name_m] [name_m]John[/name_m], [name_f]Ezri[/name_f] [name_m]John[/name_m], [name_m]Haskell[/name_m] [name_m]John[/name_m], [name_m]Hollis[/name_m] [name_m]John[/name_m], [name_m]Isidore[/name_m] [name_m]John[/name_m], [name_m]Kitto[/name_m] [name_m]John[/name_m], [name_f]Merit[/name_f] [name_m]John[/name_m], [name_f]Marlow[/name_f] [name_m]John[/name_m], [name_m]Oakland[/name_m] [name_m]John[/name_m], [name_m]Ozias[/name_m] [name_m]John[/name_m], [name_m]Rivers[/name_m] [name_m]John[/name_m], [name_m]Shepherd[/name_m] [name_m]John[/name_m], [name_m]Taliesin[/name_m] [name_m]John[/name_m], [name_m]Winslow[/name_m] [name_m]John[/name_m], [name_m]Wyeth[/name_m] [name_m]John[/name_m], and [name_m]Zephyr[/name_m] [name_m]John[/name_m] 
That’s a lot, so to narrow it down: [name_m]Wyeth[/name_m] [name_m]John[/name_m], [name_f]Ezri[/name_f] [name_m]John[/name_m], [name_f]Merit[/name_f] [name_m]John[/name_m], and [name_m]Kitto[/name_m] [name_m]John[/name_m]
[name_f][/name_f][name_f][/name_f]
If I had a son named John…hmm [name_f][/name_f]- maybe [name_m]Finvarra[/name_m] [name_m]John[/name_m], [name_m]Adair[/name_m] [name_m]John[/name_m], [name_m]Sholto[/name_m] [name_m]John[/name_m] or [name_m]Peregrine[/name_m] [name_m]John[/name_m] (PJ)
[name_f][/name_f][name_f][/name_f]
If I were to rank your short list, fave to least:
[name_f][/name_f][name_m]Shepherd[/name_m] [name_m]John[/name_m]
[name_f][/name_f][name_m]Hollis[/name_m] [name_m]John[/name_m]
[name_f][/name_f][name_m]Abner[/name_m] [name_m]John[/name_m]
[name_f][/name_f][name_m]Woodrow[/name_m] [name_m]John[/name_m]
[name_f][/name_f][name_m]Ephraim[/name_m] [name_m]John[/name_m]
I’d say the only one I don’t love is [name_m]Ephraim[/name_m] [name_m]John[/name_m] [name_f][/name_f]- I just find the others more balanced and sparky and highlight the good qualities of each other better?