Sunna Rannveig Davíðsdóttir (born 21 June 1985) is an Icelandic mixed martial artist who was signed with the Invicta, where she competes in the strawweight division.

[2] Prior to her professional debut, Davíðsdóttir participated in the 2015 IMMAF European Championships, competing at flyweight.

She won the gold medal, winning a split decision against Ilaria Norcia in the quarterfinal and achieving TKO victories over Michaela Dostalova and Anja Saxmark in the semifinals and finals respectively.

[3] Davíðsdóttir was scheduled to make her professional debut on 23 September 2016 against Ashley Greenway at Invicta FC 19: Maia vs.

[10] Davíðsdóttir returned after a two-year layoff to take part in the Invicta FC Phoenix Series 1 tournament.