"Ronaiah Tuiasosopo comes from a big football family. His father, Titus, played for USC in the late '80s and early '90s. One uncle, Navy, played for the L.A. Rams; another uncle, Mike, coaches the defensive line at Colorado. A cousin from an older generation, Manu, went to Seattle in the first round in 1979; another cousin, Marques, went to Oakland in the second round in 2001."
While the article doesn't specifically mention Matt, Manu Tuiasasopo is Matt's father and Marques Tuiasasopo is Matt's brother.