Interesting that you inquire about John Clark b.Ireland, one of 11 children. We have Thomas, one of 10 children ,Stanford, Deleware Co. NY 1809, d 1879. Do not know where the family orininated from altho I believe it was Ireland. The obituary for Thomas has his father Pulish???, Rulish??? Rupert??? in New York ,as a doctor and registar of land deeds1820's. . Thomas' stone has him born: New Rossi, Wexford Co, Wexford, Ireland.
One sister with an infirmity, Elaine d 1879. Thomas is buried in Monroe Co, MI at LaSalle Protestant Cemetery, LaSalle Twp.MI.
We need a connection for our Clark. If any of this is relavent, please email me at: Lmcr3@aol.com