anne, i am sure that there is a connection. are you sure that the entire family emigrated? my great grandmother, bertha flahavan (flavin) ultimately emigrated to new york state, but at least one sister stayed in ireland. i am quite sure that her father john who was born in the 1830/40s was from dungarvan originally. perhaps the john you mention is him, or maybe a cousin? do you have records of any other flahavans in st. marys?