Yep, Kentin's terrible. If you guys aren't into other K names and want to honour your dad I think an obviously feminine first name with Kent as the middle name is the way to go. Alexandra Kent sounds good to me.
eta: I think using your father's actual name as a middle name is a much better way to honour him than making up a name by tacking a few letters on to the end of it to 'feminise' it, or just using another K name.