I like the combo
Nathaniel Jonas. I'd prefer
Nathaniel Jonah though, just because I prefer
Jonah to
Jonas. If I had to choose between
Samuel and
Nathaniel and I was planning on using the name as a fn, then I'd go with
Samuel, but if it was for a mn, then I'd probably go with
Nathaniel. Also, I much prefer
Nathaniel to
Nathanael.