My last name is Giaimo. The most likely theory as to the origin of the name is that it is a corruption of "di Giacomo" which means "(son) of Jacob". It's a fairly rare name from Sicily.

Actually "di Giacomo" means (son)OF JAMES Of Jacob would be "Di Giacobbe"

But James and Jacob are actually the same name. (Well, they're both derived from the Latin Jacobus, anyway.)

Well according to This Website The Latin Jacobus is for James which is Giacomo, but it mentions that Jacob comes from Jacob, not Jacobus. Yet when looking it up further James is taken from a form...