I like them both a lot, if I had to pick I would choose
Israel, but because I'm a fairly religious person, not because it's especially nicer.
Isaiah is also common which turns me away.
Other I names are
Isaac,
Iain,
Imre,
Indy,
Inigo,
Indigo,
Indiana, and
Innes.
Combos
Israel LawrenceIsrael LewisIsrael CameronIsrael FrancisIsrael Benedict