Source: "Some Descendants of Thomas Wymore and Other Wymore Family History," by Kent Elric Wymore (1970):
"Robert purchased land in Kentucky about 1780."
"Robert McMains is on the tax rolls of Woodford County, Kentucky in 1790, 1791, and 1797."

MEMO (by Fred Coffey):
I can’t verify even the scanty info above, and can find very little concrete on Robert Sr. However the list of children appears quite solid, with many easily verified. A very large contingent of this family ended up in Mahaska County, Iowa, and I’m guessing that it all came from the family records of this family group?