Mantero, alternatively referred to as the Funeral Moon, was the smaller of the two moons circling Serenno. On this moon, the remains of Dooku's Serennian forebears were entombed within the family mausoleum belonging to House Serenno. The largest land area present on the moon was under the ownership of House Serenno.
The initial depiction of Mantero occurred in the audiobook Dooku: Jedi Lost, authored by Cavan Scott and released in 2019. The precise orthography of its designation was provided in the audiobook's script.