Theodore George Crenwelge, 83, brother of Mrs. Henrietta Zettner of San Antonio, died Tuesday at his Helotes Residence.  A native of Fredericksburg, he had lived in Helotes 65 years.  He was engaged in farming. He was a member of Herman Sons and the Lutheran Church.  Other survivors include a foster son, Burton Braun, and foster daughter, Mrs. Bernice Kemp, Helotes; and anotheer sister, Mrs. Bertha Tatsch, Castroville.  Riebe Funeral Home is in charge.