John of Atholl was a bishop mentioned only in the Orkneyinga Saga as being sent by King David I of Scotland on a diplomatic mission to Orkney. He is called a Bishop "from Atholl" which could either mean he was Bishop of Dunkeld or that he held another episcopal see but originated in province of Atholl.
References
- Watt, D. E. R., Fasti Ecclesiae Scotinanae Medii Aevi ad annum 1638, 2nd Draft, (St Andrews, 1969)
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