Family Tree :

Khattab ibn Nufayl = Hantamah bint Hisham Makhzumi

'Umar ibn al-Khattab =
Zaynab bint Maz'un
Umm Kulthum bint
Qaraybah bint Abi
Jamila bint Thabit
'Atikah bint Zayd
Umm Kulthum bint
Umm Hakim
Umm Walad(Lihayyah)
Umm Walad(Fakhihah)

Zayd ibn al-Khattab
Fatima bint al-Khattab
Safiyah bint al-Khattab

ibn Umar =
Safiyya bint Abi
Umm Walad
Umm Walad

Hafsa bint Umar =
Khunays ibn Hudhaifa
Prophet Muhammad(saw)

'Ubaidallah bin 'Umar

'Asim bin 'Umar

Others:
'Abdur Rahman bin
Zayd bin 'Umar
'Iyad bin 'Umar
Zaid (older) bin
Ruqayyah bint 'Umar
Fatima bint 'Umar
'Abdur Rahman(middle)
'Abdur Rahman(younger)
Zainab bint 'Umar

Abu Bakr
Abu 'Ubaida
Waqid bin 'Abdullah
'Abdullah bin 'Abdullah
'Umar bin 'Abdullah
Hafsa
Sawda
Bilal bin 'Abdullah
Zayd bin 'Abdullah
Salim bin 'Abdullah
'Ubaidullah bin 'Abdullah
Hamza bin 'Abdullah

None

'Abdullah bin 'Ubaidullah

Hafs bin 'Asim
'Ubaidullah bin 'Asim
Umm Maskayn
Umm 'Asim