Divorce CourtNathalie Mae Xiffenegger,46, 2255 5th St. was granted an absolute divorce from Myron L. Niffenegger, 45, 1012 17th Ave. on grounds of cruel and inhuman treatment. They were first married on Dec. 28, 1948, and remarried on Sept. 29, 1965, in Chicago. They separated in July 1974. Custody of minor children was awarded to the mother by Judge Franz W. Brand and property settlement and support were ordered.Dorothy Amans, Freeport, has been granted a divorce in Stephenson Co., 111., from Harrie Amans, Monroe, on grounds of mental cruelty. They were married Dec. 29. 1945, and custody of one minor child was awarded the mother.