"Variant of Toby"
The name Tobi is commonly a unisex name from the "English" origin.
Tobi is a spelling variant of Toby, the English short form of Tobias, a name that comes from the Hebrew Toviyah. In German-speaking countries Tobi is the usual short form of Tobias rather than an independent name. The spelling with a final i is the main thing that separates it from Toby in English use.
Toby means "The Lord Is Good".
The pronunciation of Tobi is TOH-bee.