▁a ▁p iv otal ▁role ▁in ▁the ▁cons olid ation ▁of ▁Sweden ▁while ▁Jar l ▁in ▁Sweden . ▁▁ ▁His ▁son ▁Val dem ar ▁Bir gers son ▁became ▁King ▁of ▁Sweden ▁in ▁ 1 2 5 0 ▁as ▁the ▁successor ▁to ▁his ▁mat ernal ▁uncle , ▁Eric ▁XI ▁of ▁Sweden , ▁called ▁" the ▁l isp ing ▁and ▁the ▁l ame " ▁( king ▁ 1 2 2 2 - 1 2 5 0 ); ▁he ▁was ▁the ▁first ▁of ▁the ▁House ▁of ▁B j äl bo ▁- ▁better ▁known ▁as ▁the ▁Fol k ungs ▁- ▁and ▁was ▁the ▁King ▁of ▁Sweden ▁in ▁ 1 2 5 0 ▁- ▁ 1 2 7 5 . ▁E lav us ▁( E lo f ) ▁Magn us son ▁died ▁in ▁ 1 2 6 8 , ▁perhaps ▁son ▁of ▁In grid ▁Y l va ▁from ▁a ▁later ▁marriage . ▁Given ▁the ▁many ▁sons , ▁he ▁may ▁also ▁have ▁had ▁daughters ▁whose ▁names ▁are ▁not ▁known . ▁ ▁Str ug gle ▁for ▁the ▁crown ▁Jud ging ▁from ▁the ▁properties ▁of ▁his ▁descend ants , ▁Magn us ▁Minn is ki öld ▁owned ▁various ▁lands ▁in ▁Ö ster g öt land , ▁and ▁is ▁probably ▁responsible ▁for ▁the ▁construction ▁of ▁the ▁church ▁of ▁B j äl bo . ▁Although , ▁as ▁the ▁younger ▁brother ▁of ▁Bir ger ▁B ros a , ▁Magn us ▁was ▁not ▁the ▁head ▁of ▁the ▁powerful ▁family , ▁his ▁central ▁position ▁in ▁the ▁r uling ▁el ite ▁suggests ▁that ▁he ▁was ▁act ively ▁involved