Brother of Blessed Herman of Heidelberg. Benedictine monk and priest at the monastery of Niederaltaich, Bavaria (modern Germany). After his brother‘s death, Otto exercised his vocation from Herman‘s old cell.
- Book of Saints, by the Monks of Ramsgate
- Kirken i Norge
- La fête des prénoms
- Our Sunday Visitor’s Encyclopedia of Saints
- “Blessed Otto of Heidelberg“. Saints.SQPN.com. 26 December 2013. Web. 26 December 2014. <>