Mr. and Mrs. John R. Cronin of Buffalo celebrated their 50th anniversary with a renewal of their marriage vows at a Mass in St. Thomas Aquinas Catholic Church, Buffalo, followed by a luncheon in Brierwood County Club, Hamburg. Mr. Cronin and Peggy Power were married July 21, 1956, in St. Teresa Catholic Church, Buffalo. He is retired from the U.S. Postal Service and the South Buffalo Railway. The couple has three children and 10 grandchildren.