Of the two, I prefer [name_m]Kiernan[/name_m], though I say it KEER-nan. [name_f][/name_f] I’m also very fond of [name_m]Kieran[/name_m] (KEER-an) or the original Gaelic [name_m]Ciaran[/name_m], or also Tiernan/Tierney, though I like that with [name_m]Kieran[/name_m] or [name_m]Kiernan[/name_m] you would avoid the repeated initial with [name_m]Tolliver[/name_m] and [name_m]Tiernan[/name_m] (though stylistically I do really like them together!). [name_f][/name_f] Also love [name_m]Truett[/name_m] and [name_m]Truman[/name_m] but they feel more like [name_m]Tiernan[/name_m] than [name_m]Keenan[/name_m] and [name_m]Kiernan[/name_m] lol.
[name_f][/name_f]Good luck!