These are the Arab world's most common family names...

Note: the results include expatriates of a country and not only its citizens. 

What are some of the most common surnames in the region? The results will surprise you. 

Forebears.com has a tool that reveals some of the most common surnames in each country. Take a look: 

In Saudi Arabia, the most common surname is Khan. 

Approximately 585,979 people in the kingdom bear the surname Khan, followed by Mohammed (200,931), Hussain (189,965) and Ahmad (157,297).

See the entire ranking here. 

In Egypt, the most common surname is Mohamed. 

Approximately 1,716,343 in the country bear this surname. 

Mohamed is followed by Mahmoud (708,172), Ibrahim (656,180). Other family names in the top 10 include Gamal (624,004) and Mostafa (573,749). 

See the entire ranking here. 

Disclaimer: Mohamed was followed by Abd, part of a conjugate family name, which cannot be fairly placed in the ranking.

In the UAE, the most common surname is Khan. 

Approximately 137,035 people bear this family name, followed by Hussain (51,363), Nair (47,365) and Mohamed (41,059). 

See the entire ranking here. 

In Lebanon, the most common family name is Khoury. 

Approximately 54,749 people in the country bear this family name, followed by Haddad (47,388).

Among the top 10 surnames in Lebanese is Aoun, with about 20,975 holding the last name. 

See the entire ranking here.

Disclaimer: The ranking lists 'Abou' as the most common surname but that's only because forbears.com doesn't register conjugate family names. So the #1 here actually goes to a cluster of a massive number of family names. 

In Bahrain, the most common surname is Ali. 

Approximately 15,549 people bear this family name in the country followed by Ahmed (12,459), Kumar (11,531) and Khan (10,211). 

See the entire ranking here. 

The most common family name in Jordan is Ahmad (43,803) followed by Haddad (39,703) and Saleh (34,062).

Among the top 10 surnames in the country include Hamdan (28,729) and Jaber (23,458). 

See the entire ranking here. 

Disclaimer: Abu is listed as #1 only because forebears.com doesn't register conjugate family names (so Abu Hosn, for example, would be listed as Abu), so the ranking doesn't refer to a single family name but to at least 50. 

The most common surname in Qatar is Mohammad. 

Mohammad/Mohammed is listed twice because of differences in spelling, but we all know it's only an issue of transliteration. Add them together and Mohammed is the most common last name (22,169). Khan is second at 20,583. 

Hussain (7,840) ranks third. 

See the entire ranking here. 

Disclaimer: Khan is listed as No.1 in the ranking, but after combining the results of Mohammad/Mohammed -- the ranking differs. 

The most common surname in Kuwait is Khan. 

Approximately 21,753 people bear this surname in the country followed by Hussain (12,784), Mohamed (12,209) and Varghese (11,965).

See the entire ranking here.

The most common surname in Morocco is Alaoui. 

Approximately 225,601 people bear this surname in the country followed by Alami (167,002) and Hassan (142,972). 

See the entire ranking here.

Disclaimer: Ait is listed as #1 only because forebears.com doesn't register conjugate family names, so the ranking doesn't refer to a single family name but to at least 50. 

The most common surname in Oman is Khan.

Approximately 37,603 people bear this surname in the country followed by Al Balushi (34,911), Nair (23,676) and Oman (19,931). 

See the entire ranking here.