Hannu (from Hannes, a diminutive of Johannes) is a Finnish first name. Notable people with the name include:
Hannu Aravirta (born 1953), Finnish ice hockey player
Hannu Kaislama (born 1956), Finnish boxer
Hannu Kamppuri (born 1957), former professional ice hockey goaltender
Hannu Kapanen (born 1951), former Finnish ice hockey player
Hannu Manninen (born 1978), Finnish Nordic combined athlete
Hannu Mikkola (born 1942), retired world champion rally driver
Hannu Patronen (born 1984), Finnish footballer
Hannu Rajaniemi (born 1978), Finnish sci-fi author
Hannu Salama (born 1936), Finnish author
Hannu Siitonen (born 1949), Finnish athlete
Hannu Taipale (born 1940), former Finnish cross country skier
Hannu Takkula (born 1963), Finnish politician
Hannu Tihinen (born 1976), Finnish footballer
Hannu Toivonen (born 1984), Finnish ice hockey goaltender
Hannu Touru (born 1952), experienced football manager
Hannu Virta (born 1963), retired Finnish professional ice hockey defenceman
Hannu Vitanen, fictional Finnish character from the webcomic A Redtail's dream.
