Family Tree : Umm Thabit bint Qays b. Shammas

Qays b. Shammas b. Malik = Khawla bint 'Amr b. Qays

Umm Thabit bint Qays b. Shammas =
Thabit b. Sufyan

Thabit bin Qays
Zaynab bint Qays

Simak bin Thabit bin Sufyan =
Mandwas bint 'Ubada

al-Harith bin Thabit bin Sufyan

Thabit bin Simak
Layla bint Simak