History

• 300: Established as Diocese of Erdonia (Italiano) / Herdonitan(us) (Latin)
• 500: Suppressed (to Diocese of Eca)
• 2004.06: Restored as Titular Episcopal See of Erdonia (Italiano) / Herdonitan(us) (Latin)

Titular Bishop Titular Bishop (2019.10.10 – ...): Bishop Gerardo Joseph Colacicco (66) Auxiliary Bishop of New York (USA)

Former Titular Bishops

• Titular Bishop:  Bishop Robert John Brennan (59) (2012.06.08 – 2019.01.31)
• Titular Bishop:  Bishop Roberto Calara Mallari (63) (2006.01.14 – 2012.05.15)

as of 2022.01.02

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