Date of birth	1865
Date of death	1930
Other Forms of Name	Hannikainen, Karl Onni Gerhard (1865-1930) Hannikainen, Onni (1865-1930) Hannikainen, O (1865-1930)
Identifiers	0000000062752065 (isni) http://urn.fi/URN:NBN:fi:au:finaf:000076538 (finaf)
Sources	Kuka kukin oli 1900-1961