Tyra of Denmark
She was first married to the Swedish prince and throne claimant Styrbjörn Starke ( Styrbjörn the Strong ) , son of King Olof Björnsson . 
<triplet> Styrbjörn Starke <subj> Olof Björnsson <obj> father <triplet> Olof Björnsson <subj> Styrbjörn Starke <obj> child