Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
MINCHIN
As described in historical dictionaries
Patronymica Britannica (1860)
MINCHIN. Probably an old personal name of the A-Sax. period, whence the local names Minchinton and IMinchinhampton. The Irish branch went over with William III., and almost all the owners of the name are said to be located in or about Moneygall, near Menagh, co. Tipperary.