Anna Wijmer was the mother of Jan Six, the painting has always been in the possession of the Six family. For a while it was considered to be painted by someone from Rembrandt's workshop, but it is now accepted as a Rembrandt, with assistance from a workshop member.
Literature
Catalogues raisonnés
HdG 728
Bredius 358 Bauch 499
Gerson 235 Bredius/Gerson 358
Tümpel A112 (workshop?)
Corpus III C 113 (workshop) Corpus VI 180