I have a great aunt, Ellen Kinsella, who was married to James Synott. I have also seen his name spelled Simmott. They lived in the area of Fishkill/Beacon, NY, USA. He died in May of 1900. I don't know his birth date, but his wife was born around 1875. He was probably also born in the 1870's.
Ellen Kinsella's father, Patrick Kinsella, was born in Ireland in 1837. Died in the USA 1902. Might be no connection to you, but it seems like an interesting coincidence.