Grennon was born 67 years ago. Cities Grennon has lived in before are Weymouth and Quincy. This person's birth year was listed as 1957. Grennon now resides at 100 Bicknell St #2, Quincy, Ma 02169. The possible relatives of Grennon are Edward L Grennon, K M Gallaghergrennon, Ann Gallagher and 2 other people. The number currently linked to Grennon is (617) 472-6751.