William O. Tiron. was a late 13th-century Tironensian abbot and bishop in the Kingdom of Scotland. He appears in the extant sources for the first time on 25 April 1276; he is Abbot of Arbroath. According to the Scotichronicon, the work of the 15th-century historian Walter Bower, William's predecessor Adam de Inverlunan had died in 1275, so William probably became abbot in either that year or in 1276.
- Occupation
- Catholic priest
- Position held
- abbot
- Born
- 1200
- Died
- 1290
