During one of his frequent trips to Venice, Galileo met a young woman named Marina, daughter of Andrea Gamba, and started a relationship with her. She moved into his house in Padua and bore him three children: Virginia (16 August 1600 – 1634), later Sister Maria Celeste; Livia (1601–1659), later Sister Arcangela; and Vincenzo (1606–1649). In none of the three baptismal records is Galileo named as the father. Virginia was described as "daughter by fornication of Marina of Venice," with no mention of the father; on Livia's baptismal record the name of the father was left blank; Vincenzo's baptismal record announced "father uncertain" ("Galileo's Daughter" 24, Dava Sobel, 1999). Galileo's position as a professor and his many friendships among the Venetian nobility probably made it unwise for him to figure officially as the children's father.