Dan, the fifth of Jacob's sons and the ancestor of the Tribe of Dan, was the son of Jacob's concubine Bilhah, Rachel's handmaid. He only had one full brother, Naphtali, though he had 10 other half-brothers.

Origin:Hebrew. Meaning:To judge. Some names have that evergreen quality—they're at once familiar yet sound cool and trendy at the same time! Dan is one such example, and this Hebrew boy's name means "to judge." It also has biblical roots, as Dan was a son of Jacob and the founder of one of the 12 tribes of Israel.

A Dan is a measure of advanced rank, often used in martial arts and the board game go. It usually ranges from 1 to 10, with higher numbers indicating greater skill. In martial arts, it is used for black belts only. In go or shogi, players of 1 Dan or above can be considered "masters".

Divers Alert Network (DAN) is a group of not-for-profit organizations dedicated to improving diving safety for all divers. It was founded in Durham, North Carolina, United States, in 1980 at Duke University providing 24/7 telephonic hot-line diving medical assistance.