My first name.

Chad
English: modern spelling of Old English Ceadda, name of a 7th-century saint who was for a time archbishop of York. This is of uncertain derivation. The name is comparatively rare, even among Roman Catholics, by whom it is chiefly favoured.
A Dictionary of First Names, Oxford University Press, ISBN 0192800507

Update:  the following is what I found on www.behindthename.com

CHAD

Gender: Masculine

Usage: English

Pronounced: CHAD  [key]

From the Old English name Ceadda which is of unknown meaning, possibly based on Welsh cad "battle". This was the name of a 7th-century English saint. Borne primarily by Catholics, it was a rare name until the 1960s when it started to become more common amongst the general population. This is also the name of a country in Africa, though it originates from a different source.