I like the name
Jack, and I don't think it's as popular as you make it our to be. I very rarely see it in local birth announcements, and here it's on people's lists of names they like, but not that many. And, even if it were very popular, who cares? You like the name, and that's all that matters.
Anyway, I suggest
Jack Paul,
Jack Thomas, and
Jack Donovan.
The sands of time have already begun to pour against you. - "The Mummy Returns"