Thad is a Greek boy name. The meaning of the name is `Praise ` Where is it used? The name Thad is mainly used In English.It is an abbreviated form of Thaddeus, used In English and In the bible.See also In Spanish: Tadeo In Slovene: Tadej In Russian: Faddei In Portuguese: Tadeu In Polish: Tadeusz In Italian: Taddeo In English: Tad Thad doesn`