Where Does The Last Name Theory Come From? ^{nationality or country of origin}

The last name Theory is held by more people in Afghanistan than any other country/territory. It may be found as a variant:. For other potential spellings of this surname click here.

How Common Is The Last Name Theory? ^{popularity and diffusion}

The surname is the 4,908,606^th most prevalent last name worldwide. It is borne by around 1 in 455,471,620 people. The last name occurs predominantly in Asia, where 100 percent of Theory reside; 94 percent reside in South Asia and 94 percent reside in Islamic South Asia. Theory is also the 962,660^th most commonly used given name internationally, borne by 97 people.

The surname is most widely held in Afghanistan, where it is borne by 13 people, or 1 in 2,473,322. In Afghanistan Theory is most prevalent in: Nangarhar, where 31 percent are found, Herat, where 23 percent are found and Kabul, where 15 percent are found. Barring Afghanistan this last name is found in 2 countries. It is also found in Iran, where 13 percent are found and Israel, where 6 percent are found.