At the time your grandfather was born (1900) there were a number of Bowler families in the Parish of Lispole. Goulin-2 families; Goulane 1 family; Banogue-2 families; Garrynadur- 1 family; Fogheroughmore -1 family. Also in the neighbouring townland of Ballingrane there was a Bowler family. Where in the US did your grandfather settle. There was a John Bowler who settled in Holyoke. He played Gaelic football. I would be interested in him. Also a Bowler family in San Francisco.
I looki forward to hearing from you.