Tigera & Merski,
When I was at the Worcester Library this week, I looked up this family. John Kavanagh died Oct 25, 1892 (born c.1839) but his obituary didn't hold any information except that he was buried in Uxbridge, wife Ellen died Feb 26, 1897. (her parents could be Patrick & Bridget) I believe Ellen was a Scully and on the census report of 1870, John & Ellen are living with a Scholay family in Northbridge and 1910 the girls have a cousin Bridget Scully living with them. Delia Kavanagh d. Sept 29, 1934 but the page of the newspaper for her obituary was missing and I didn't have time to go back to the street directories to look for Helena's date of death (she was alive past 1953).
Merski maybe you can look up John's death on the NEHGS website.
Cheryl