Tad \tad\ as a boy's name is pronounced tad. It is of English origin, and the meaning of Tad is "heart". Short form of Thaddeus (Aramaic). "Tad" is also an American slang for "small". Tad is also an anglicized form of Gaelic Tadhg.
Tad has 2 variant forms: Tadd and Thad.
Baby names that sound like Tad are Ted, Tadi and Tod.