I knew a couple of older men named Shirley. One was a Methodist minister in Illinois. The other was a big, burley, tough, flat-topped Marine Corps veteran from Utah. He always went by Shirl.
Had a friend named Shirley...first name...short, hairy great guy....hell of a plumber!
With your Shirl ... our neighbor LaVerne is a guy and a very good mechanic. Also married with 6 kids.