Squares
Squares is the rank-2 regular temperament tempering out the syntonic comma, 81/80, and the breedsma, 2401/2400. It has a ~9/7 generator, four of which make a perfect twelfth. Skwares is the no-5 subgroup version of this temperament.
See Meantone family #Squares and Subgroup temperaments #Skwares for more technical data.