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
- Den katolske kirke
- La fête des prénoms
- Our Sunday Visitor’s Encyclopedia of Saints
- “Blessed Otto of Heidelberg“. CatholicSaints.Info. 10 January 2009. Web. 11 December 2016. <>