Jooseppi Mustakallio, born to chaplain Henrik Schwartzberg ja Laura Katariina Stenbck, graduated from the Kuopio Lyceum in 1878, and was ordained a minister in 1889.
Mustakallio's parents were chaplain Henrik Schwartzberg ja Laura Katariina Stenback. Mustakallio graduated from the Kuopio Lyceum in 1878 and obtained a bachelor's degree in philosophy in 1883. In 1889 he was ordained a minister. 
