Siebenhaar

Siebenhaar is a German language surname. It is a nickname for a person with sparse hair growth– and may refer to:
 * Alex Siebenhaar (1927–2022), Swiss rower
 * Heinrich Siebenhaar (1883–1946), German gymnast
 * Klaus Siebenhaar (1952), German university lecturer, publisher and cultural manag
 * Toni Siebenhaar (1923–2000), German rower
 * Willem Siebenhaar (1863–1936), social activist and writer in Western Australia