“Niall” could refer to many different people, so the name alone is a bit too vague for a single definitive answer. Below is a quick scoop on a few notable Nialls people often mean when they ask “who is Niall.”

Most commonly meant Nialls

Niall O’Connor (rugby player)

  • Former professional rugby union player from Limavady, Northern Ireland.
  • Played fly-half, came through the Ulster Academy, signed a pro contract with Ulster in 2007, and made over 50 appearances, scoring more than 200 points.
  • Later moved to Connacht on a two‑year deal and continued his career there in the Pro12.

Niall O’Connor (environment and development leader)

  • Senior leader associated with the Stockholm Environment Institute (SEI), particularly SEI Asia.
  • Has over 20 years’ experience in environment and development, with work across government, academia, and NGOs, including time in Africa on agroforestry and community‑focused projects.
  • Previously held leadership roles with organizations like WWF in Africa, overseeing large regional programmes and teams.

Niall O’Connor (legal academic)

  • Senior Lecturer at Essex Law School (University of Essex).
  • Research focuses on employment law, fundamental rights, European Union law, and Brexit‑related legal questions.
  • Holds a PhD in Law from the University of Cambridge, plus earlier law degrees from Trinity College Dublin and the College of Europe.

Other people named Niall

  • Writers, technologists, or bloggers such as Niall Little (a CTO writing about AI and publishing) and personal bloggers like Niall Bell also appear in current online discussions.

If you can tell me where you heard “Niall” (for example, in sports, politics, YouTube, TikTok, or a specific country), I can narrow it down and give you a more precise answer.