Cathey is a surname of Scottish origin. It is a reduced form of the surname MacCathay which is Galloway surname of uncertain origin.
Morgan Cathey (born 1984), American soccer player Key Glock (born 1997 as Markeyvius LaShun Cathey), American rapper Reg E. Cathey (1958–2018), American film and television actor
References
See also Cathey Peak, a peak in the Sacramento Mountains, in the south-central part of the US State of New Mexico.