Peter S. Leibert, 64, of Newington, formerly of West Hartford, died August 25. Born in Hartford, he was the son of the late Manuel M. Leibert and Marjorie Leibert. He is survived by his brother Richard Leibert and his wife Joyce; his nieces, Debbi and AJ Kritzman, Cheryl and Nathan Mahoney, and Sarah and Matt Williams; and his grand nieces, Sally, Sophie, Sadie, Kritzman, Harrison and Miriam Mahoney and Henry and George Williams.