He was born Viktor Magnus Widkvist in Stockholm in the Jakob och Johannes parish on 27 December 1881.
In 1898 at the age of seventeen Viktor began his military career by enlisting in the Svea Engineer Battalion (Ing 1) band in Stockholm performing on the tuba and flute under music director Adolf Johnsson.
His professors included Magnus Ahlbergm (violin) and Ernst Henrik Ellberg (counterpoint).
Widqvist's compositions include numerous marches, a concert overture, folk song arrangements, and dances.
His most famous composition, the virtuosic march "Under blågul fana" [Beneath the Blue and Yellow Banner] was likely composed in or just before 1916 (the earliest score in the archives of the Flottans musikkår i Stockholm [Navy Band] is dated 1916).