Kothmann, Glenn Harold was born on May 30, 1928 in San Antonio, Texas, United States. Son of Wilkes John and Lillie (Mertz) Kothmann.
Bachelor of Science, Texas Agricultural and Mechanical University, 1950.
Member Texas State Legislature, 1957—1958, 1961—1966, 1969—1970, Texas State Senate, since 1971, president pro-tempore, 1975, vice-chairman state affairs committee, member intergovernmental relations committee, natural resources committee, chairman subcommittee elections. Major general Texas Army National Guard.