Yes, there was a Saint Chad. He was born about 620 in
Northumbria, England, and died March 2, 672, at Lichfield, England
of natural causes after a brief illness, probably the plague.
I can find no patronages for Chad but if that is your name, he
is your patron saint.
St. Chad is the patron saint of the archdiocese of Birmingham,
England, and of the diocese of Lichfield, England.