Herr Birger Persson (sometimes Petersson) of Finsta (??? - 3 April 1327) was a Swedish magnate, knight, privy councillor and Uppland's first lawspeaker.
His father was the knight Pehr Israelsson of Uppland, while his first wife was Kristina Johansdotter (d. 1293), a niece of Saint Ingrid of Skännige. His second marriage to Ingeborg Bengtsdotter of the Folkunga family produced the nun and mystic, Saint Bridget of Sweden.
He was a co-drafter of the Law of Uppland. Birger is portrayed with several coats of arms: his tombstone in Uppsala Cathedral shows his shield with two lowered wings close together, without large gaps. His seal in mediaeval letters shows two wings, with an upper base, well-separated at large intervals, between a six-leaved rose, which hangs in a garland-like object.
References
Further reading Brilioth, Yngve: "Birger Petersson" in Svenskt biografiskt lexikon (1924), vol. 4, pp. 436–439 Bengt Hildebrand, "Finsta-ätten", in Svenskt biografiskt lexikon, vol. 16, pp. 51 f. Jarl Gallén, with contribution from A. Filip Liljeholm, "Finstaätten" in Äldre svenska frälsesläkter, vol. 1:1 (1957), pp. 34–38