Almodad was a descendant of Noah

Noah

Noah was, according to the Hebrew Bible, the tenth and last of the antediluvian Patriarchs. The biblical story of Noah is contained in chapters 6–9 of the book of Genesis, where he saves his family and representatives of all animals from the flood by constructing an ark...

 and the first named son of Joktan

Joktan

Joktan or Yoktan was the second of the two sons of Eber mentioned in the Hebrew Bible. His name means "small" or "smallness"....

 in and . While the Bible has no further history regarding Almodad, this patriarch is considered to be the founder of an Arabian tribe in "Arabia Felix

History of Yemen

Yemen is one of the oldest centers of civilization in the Near East. Its relatively fertile land and adequate rainfall in a moister climate helped sustain a stable population, a feature recognized by the ancient Greek geographer Ptolemy, who described Yemen as Eudaimon Arabia meaning "fortunate...

". This is based on the identification of Joktan's other sons, such as Sheba

Sheba

Sheba was a kingdom mentioned in the Jewish scriptures and the Qur'an...

 and Havilah

Havilah

Havilah is in several books of the Bible referring to both land and people.The story of the Garden of Eden in Genesis 2:11: "And a river went out of Eden to water the garden; and from thence it was parted, and became into four heads...

, who are both identified as coming from that region.

According to Easton's Bible Dictionary

Easton's Bible Dictionary (1897)

Easton's Bible Dictionary generally refers to the Illustrated Bible Dictionary, Third Edition, by Matthew George Easton, M.A., D.D. , published in 1897 by Thomas Nelson. Because of its age, it is now a public domain resource. It contains nearly 4,000 entries relating to the Bible, from a 19th...

 "Almodad" means "immeasurable", however it has also been translated as "not measured", "measurer", "measure of God", "the beloved," or, "God is beloved", "God is love", and "God is a friend".

Many translations and scholarly works use "Elmodad", including Josephus

Josephus

Titus Flavius Josephus , also called Joseph ben Matityahu , was a 1st-century Romano-Jewish historian and hagiographer of priestly and royal ancestry who recorded Jewish history, with special emphasis on the 1st century AD and the First Jewish–Roman War, which resulted in the Destruction of...

, Douay Rheims Bible and
the Targum Ps.-Jonathan

Targum Pseudo-Jonathan

Targum Pseudo-Jonathan is a western targum of the Torah from the land of Israel . Its correct title is Targum Yerushalmi , which is how it was known in medieval times...

, which elaborates Gen 10:26 and says "begot Elmodad, who measured the earth with cords."