Lynch/Griffin near Listowel

My great grandfather, John Lynch, was born in May 1899 to John (son of Jeremiah Lynch and Elizabeth Kennelly) and Kate (daughter of Martin Griffin and Catherine Connell). I have him in the 1901 census living in Inch East (Galey parish) with his parents, older brother Jeremiah, and grandfather Martin Griffin (Kate's father, who died in 1909). I've been told he had three other brothers - Edward, Michael, and Denis - as well. Not sure about other children.

John immigrated to New York in 1926 and never spoke about his family much. His mother, Kate, died in 1942 and his father, John, in 1950, both in Ireland. I'm not sure if anyone else ever immigrated here.

Any distant relatives out there? I feel like there have to be people who remember my great grandfather somewhere! I've been told once that John's son visited Ireland to find the "old homestead" (of which nothing remained but a gate, but when he was shown a picture, my great grandfather recognized it and was driven to tears), but I don't know if he had any contact with relatives.