Strojimir was the co-ruler of the Serbian Principality alongside his two brothers Mutimir and Gojnik, from ca 851 to his and Gojnik's deposition in the 880s after an unsuccessful coup against the eldest Prince Mutimir.
He was a younger son of... Wikipedia
Born: 848 AD, Stari Ras, Sebečevo, Serbia
Died: 890 AD (age 42 years)
Parents: Vlastimir
Children: Klonimir
Grandchild: Časlav of Serbia
Siblings: Mutimir of Serbia