Mantero, also known as the Funeral Moon, was the smallest of two moons that orbited Serenno. The bones of the Serennian ancestors of Dooku were buried in House Serenno's family mausoleum on the moon. House Serenno owned the largest plot on the moon.
Mantero first appeared in the the audiobook Dooku: Jedi Lost, written by Cavan Scott and published in 2019. The spelling of its name was given in the script of the audiobook.