What is "gillenwater"

Gillenwater may refer to:

• Carden Gillenwater (1918–2000), American Major League Baseball player
• Claral Gillenwater (1900–1978), American Major League Baseball player
• James R. Gillenwater (1871–1946), American Medal of Honor recipient
• Jay Y. Gillenwater, co-discoverer of Schmitt Gillenwater Kelly syndrome, a genetic disease