I have no proof of realtionship but have a hunch that we share ancestors.
My Reidys came from County Clare, Ireland, in 1880 and settled in White Haven PA. Wife Ellen Quinlivan Reidy and much of the family moved to NJ in 1901 after the death of husband/father Michael Reidy.
My Reidys share the first names of John Patrick James and
Thomas with names I've seen for Chemung Reidys.
Many of my Reidy men were railroaders with the Lehigh Valley RR, Delaware Lackawanna & Western RR, and NJ Central - right up to recent times.

Other surnames in family are Quinlivan and Doohan.

Too many similarities not to be related!