Either from Irish Aodán meaning little fire, or from the port city of Aden in Yemen.
Aden has several overlapping stories, which is one reason it has traveled so easily across cultures. In some cases it is used as a variant of Aidan, the Irish name from Aodhán, meaning "little fire" and connected to the old Celtic god-name Aodh. In other contexts, Aden can also reflect Arabic usage, where it may be associated with the port city of Aden in Yemen or with roots suggesting settlement or paradise in related naming traditions.
Because the spelling is short and clean, many modern families choose it for sound as much as for a single fixed etymology. If read through the Irish line, the name belongs to a venerable tradition: Saint Aidan of Lindisfarne was a seventh-century missionary revered in early medieval Christianity, and the Aidan family of names later reemerged strongly in the modern English-speaking world. The spelling Aden became especially visible during the late twentieth and early twenty-first centuries, when Aidan, Aiden, Ayden, and similar forms surged in popularity.
That boom gave Aden a contemporary, energetic image, but one with roots stretching back to early Celtic and Christian history. The name's modern appeal lies in its balance of softness and brightness. It sounds strong without being harsh, familiar without feeling old-fashioned.
Because it may be read through Irish, Arabic, or place-name associations, Aden carries a subtle global character. It also belongs to a broader era of naming in which vowel-forward, two-syllable boys' names came to feel stylish and approachable. That combination of ancient echoes and modern ease has helped Aden remain appealing across different communities.