Akra-Kristín Þorsteinsdóttir

(c. 1410 – 1490), also named Akra-Kristín after the farm Akrar in Blönduhlíð in Skagafjörður, Iceland where she lived, was an Icelandic noblewoman in the 15th century.

Kristín was the only daughter of the lawyer and his wife whose marriage certificate from the Hvalsey church in Greenland dated September 16, 1408 is the last written source of Norse settlement in Greenland. Kristín inherited a lot of wealth from her parents. Her first husband was the lawyer who died in 1440. Kirstín then married the magistrate Torfi Arason who died while abroad in 1459. Kristín continued living in Akra after Torfi's death and lived to an old age. She was renowned in her time for being one of the richest women in the country and marrying two powerful aristocrats.

Kristín and Helgi's daughter Ingveldur, wife of the Reykhólar magistrate , and the farmer of Reynir in Mýrdalur.