There is a conversation between Rishi Maitreya & Vidura in Srimad Bhagavata Purana 3.12.28
वाचं दुहितरं तन्वीं स्वयम्भूर्हरतीं मनः ।
“Oh Vidura, we have heard that the daughter Vâk who was born from his body distracted the mind of Brahmâ”
*An another name for Saraswati is “goddess of speech” (वाङ्मयी, वाग्देवी)
Goddess Saraswati is daughter of Brahma. Goddess Saraswati was born from the body of Brahma similar to her 10 brothers.
They were also born from the body parts of Brahma like Marichi Rishi , Atri Rishi , Angirasa Rishi, Pulaha Rishi, Pulutsya Rishi, Krathu Rishi, Vashistha, Prachethasa, Bhrigu and Narada Muni.