The name Tahj is an anglicized spelling of the Arabic name Taj, which means "crown" or "diadem." Its origins can be traced back to the Arabic language and Islamic culture of the Middle East and North Africa.

The name Taj has been in use for centuries, with one of the earliest recorded examples dating back to the 12th century. It was the name of a renowned Persian poet and scholar, Taj al-Din al-Munajjim, who lived from 1155 to 1233 AD. He was known for his contributions to the field of astronomy and his poetic works.

Another notable figure with the name Taj was Taj al-Mulk, a powerful 11th-century vizier (prime minister) in the Seljuk Empire, which ruled over parts of Central Asia and the Middle East. He played a significant role in the administration and politics of the empire during his time.

In the 17th century, the name gained iconic status with the construction of the Taj Mahal, one of the most famous and beautiful architectural monuments in the world. It was built by the Mughal Emperor Shah Jahan as a mausoleum for his beloved wife, Mumtaz Mahal, whose name meant "Crown of the Palace."

Tahj is also the name of a fictional character in the Star Trek universe, played by actor Terry Farrell in the television series Star Trek: Deep Space Nine. The character, Jadzia Dax, was a Trill symbiont who joined with various hosts, including Tahj.

Another notable person with the name Tahj was Tahj Mowry, an American actor and singer born in 1986. He is best known for his roles in the sitcoms "Smart Guy" and "Baby Daddy," as well as his work as a voice actor in various animated series.

While the name Tahj is not as common as its Arabic counterpart Taj, it has been used throughout history by individuals from various backgrounds and cultures, reflecting the enduring appeal and meaning of this name.