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Dictionary of Medieval Names
from European Sources

Bonfilius m. Latin bonus 'good' + Latin filius 'son'.

The name of a 12th C Italian saint.

France
Latin
1075 Bonifilius (nom) StVdM-II 731; 1115 Bonifilii (gen) ibid. 734
French
1368 Bon Fillot beauchet-vol1 p. 13
Cite as: S.L. Uckelman. "Bonfilius". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2015, no. 2. http://dmnes.org/2015/2/name/Bonfilius.