Sibylle was a daughter of Elector Albrecht III Achilles of Brandenburg ( 1414–1486 ) from his second marriage to Anna ( 1436–1512 ) , daughter of the Elector Frederick II of Saxony .
Head entity: anna Q454929 19
Tail entity: frederick ii Q702602 28 29
Relation (head \u2192 tail): P22
Inverse relation (tail \u2192 head): P40