Kathryne Passailalgue Williams, 81, a former teacher here who had been active in church work, died of cancer Thursday while visiting her son, Charles H. Williams Jr., in Ann Arbor, Mich. She lived in Ashton, Md.

Mrs. Williams was born in Charleston, S.C., where she graduated from Memminger Normal School. She taught school there prior to her marriage in 1925 to the late Navy Lt. Cmdr. Charles H. Williams. They moved to the Washington area the next year. He died here in 1976.

Mrs. Williams was an eighth-grade teacher and principal of the Suitland Elementary School here for about six years.

For many years, she taught the kindergarten class at the Episcopal Church of the Epiphany in Washington.

In addition to her son, she is survived by two brothers, retired Army Col. Edward P. Passailaigue, of Atlanta, Ga., and Jack M. Passailaigue, of Columbus, Ga.; three sisters, Lilian A. Passailaigue, of Columbus, Lurline Powell, of Winter Park, Fla., and Frances P. Hinson, of Atlanta, and two grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the President Episcopal Bishop's Fund for World Relief, 815 2nd Ave., New York City, 10017, or to the American Cancer Society.