"Ancestry of Senusert. In the tomb of prince Uah-ka B at Qau, in an inner chamber, is painted a scene of the son of Uah-ka, named Senusert; there is no cartouche. As the Uah-ka family were of about the 4th or 5th dynasty (the name being unknown either in the 11th of the 12th dynasty), this implies that the 12th dynasty Senusert family descended from the Uah-ka family. Here we have, then, a link between the Galla type on the sphinxes and the 12th dynasty. The separate identification of these sphinxes follows further on. The 12th dynasty was undoubtedly descended from Amenemhat, the great vizier of the 11th dynasty. It seems, then, that he married the heiress of the Uah-ka family, as stated in the pseudo-prophecy, "A king shall come from the south whose name is Ameny, son of a Nubian woman." She called her son by the family name Senusert, and he was the founder of the 12th dynasty, according to Manetho. Waka is the god of the Gallas." (Petrie, W.M.F., The Making of Egypt, 1939, p. 126)
Amenemhet I = Neferitatjenen
Relationships: Where = occurs between two names it indicates marriage.
Name of rulers printed in bold; names of women in italics.
All family members are not listed to make it easier to follow the linkage.
Senusret I =  wife sister Neferu III
Amenemhet II = Kemanub
Ptah nefru
Ataurt
Ata
Senusret II = Khenemet-Nefer-Hedjet
Sithathoriunet
Senusret III = Mereret
Hetepti =  Amenemhet III = Aat
Amenemhet IV = ? Sobeknefru
Neferusobek (Sobekkare)
Had no male heir and was succeeded by his sister
12th Dynasty (1991-1763 BC)
Amenemhet I
Senusret I
Amenemhet III
Senusret III
References:

Rice, Michael, Who's Who in Ancient Egypt (Who's Who), Routledge; 1st edition, 1999
Petrie, W.M.F., The Making of Egypt, Sheldon Press, London, 1939
Senusret II
Model of a boat
Tomb of the chancellor. Nakhti at Assiout
Click to enlarge photos
Head of a Queen
Oromo (Galla) types
Senusret aka Sesostris
Sesostris = Nefert