McCayn
McCayn is a proper noun most commonly encountered as a surname in English-speaking regions. It is relatively uncommon, and reliable, published information about its origin, prevalence, or history is limited.
Etymology and variants: The form may derive from Gaelic or Scottish surnames that begin with Mac- or
Usage and notable bearers: There are few publicly documented individuals with the exact spelling McCayn in
Related names and see also: The surname is related to, or variably spelled as, McCain, MacCay, and
Notes: As with many rare surnames, further scholarly research and reliable genealogical sources would be needed