A name that means something.
IThe Prophet Ishmael, eldest son of Ibrahim and Hajar. Considered the ancestor of the Arabs. Qur'an 19:54 describes him as "true to his promise, a messenger and a prophet."
Arabic root: Hebrew, "God hears"
"Ismail" is the cleanest US spelling. "Ishmael" is the English biblical form (famous from Moby-Dick) and works as a cross-cultural choice.