Wellenreuther is a surname. Notable people with the surname include:
Claus Wellenreuther (1935–2026), German entrepreneur, co-founder of SAP AG Ingo Wellenreuther (born 1959), German politician (CDU) Maren Wellenreuther, German marine scientist in New Zealand Timon Wellenreuther (born 1995), German association footballer