Surname Tadg (Tadg 
) , in the world, is a very rare last name. The cognomen Tadg is characteristic of Israel, where it is a rare surname, Thailand, where it is an extremely rare surname, and China. Likewise, Tadg is the forename as well as the last name.
| cathal mac tadg Irish king (b. 901) |
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| conchobar mac tadg Irish king (b. 901) |
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