I am not sure if this is the same Andrew your looking for.
Original Leiter was Jacob Leiter born about 1706 arrived Penn a mennonite in Lancaster county (dauphin)Penn. Probably of Swiss origin. In 1762 he bought 362 acres near what is now leightersburg Md. part of the resurvey of Well Taught.
One of his sons Jacob born in Penn was willed the 362 acres in MD. and married Juliana Fogle. They had 10 children of which one of them was a son: Andrew Leiter born 1770 in MD and married Barbara Kieffer daughter of Martin and Elizabeth Kieffer. He was a blacksmith and was a energetic business man who laid out the town of leitersburg, Md and sold lots, but unfortunetly he died insolvent (Broke). He and his wife were living where the hotel now stands on the northwest corner of the square in Leitersburg, Md. Both were members of the Luthern Church. I hope this helps.