Urwah (may Allah have mercy on him) states, among the names of those who were present at Badr: Thabit bin Amr bin Zayd bin Adi bin Sawwad bin Usaymah, or Usayyah, who was their ally from Ashja'.
Hadith Referenceالمعجم الكبير للطبراني / باب الثاء / 1357