He was born in Kristiania (now Oslo), Norway. He was the son of barrister
Christian Lasson (1830–93) and Alexandra Cathrine Henriette von Munthe af Morgenstierne (1838–81). His sisters included painter
Oda Krohg (1860–1935) and cabaret singer
Bokken Lasson (1871–1970). His sister Alexandra married painter
Frits Thaulow, and his sister Soffi married Danish poet
Holger Drachmann. His musical compositions were modest in number, consisting of 15 songs and 9 piano pieces besides an orchestra overture. His most notable composition is the piano solo
Crescendo! (1882). ==References==