She has two ladies-in-waiting ( meninas ) : doÃ a Isabel de Velasco ( 2 ) , who is about to curtsy to the princess , and doÃ a MarÃ a Agustina Sarmiento de Sotomayor ( 3 ) , who kneels in front of Margarita , offering her a drink from a red cup , or bucaro , that she holds on a golden tray . She is attended by two ladies-in-waiting , or meninas : doÃ a Isabel de Velasco ( 2 ) , who is poised to curtsy to the princess , and doÃ a MarÃ a Agustina Sarmiento de Sotomayor ( 3 ) , who kneels before Margarita , offering her a drink from a red cup , or bucaro , that she holds on a golden tray .