I found an obituary for Henry Pow, Sr., which matches the 1966 death date listed above. It says he was born in Bradford, England and lived most of his life in the Bridgeport area. His survivors were listed as sons William and James (both of Bridgeport), Fred and Joseph (both of Stratford), daughters Mrs. Sarah Buckley, Mrs. Lillian Sorensen, and Mrs. Edith Goodchild (all of Stratford), and Mrs. Anna Mayo of Bridgeport. He was also survived by sister Mrs. Jane Wilson of Bridgeport and many grandchildren & great-grandchildren.
I also found an obit for Sarah Pow Buckley. Her late husband is listed as Samuel, not Joseph. It says he was a founder of Buckley Brothers Fuel Company in Stratford. She was survived by two sons, a daughter, 4 brothers, 3 sisters, 8 grandchildren, and several nieces and nephews.
Also found an obit for Anna Pow Mayo, who died 22 Nov. 1973. She was survived by her husband (Evariste L. Mayo) and a son. Her four brothers, two sisters, two grandchildren, and several nieces and nephews also survived her.
Lillian's husband died in June 1973 and they are listed as having four sons and a daughter.
I also found an article about a 50th anniversary party for Mr. & Mrs. John C. Sorensen. It says they were married on 7 Feb. 1923 in St. James Church in Stratford. Guests included the Pow siblings. Their grandchildren and great-grandchildren are all listed.
If you want the descendants' names, I'll PM you, since they are more likely to be living.
Edited to add: the 1939 Bridgeport directory says Edith married George Goodchild. They are listed in the 1940 directory as George J. & Edith A., living in Stratford.
Also, found a death notice for Hannah Ricketts, age 88, who died 10 Dec. 1960. Joseph Pow was one of the pallbearers.
Just found an article that says Sarah & Lillian married their husbands in a double wedding on 7 Feb. 1923.