Marcellia
Could not find Marcelliis in Logeion dictionaries.
Marcelliis Proper-name noun: neuter dative plural, Proper-name noun: neuter ablative plural of Marcellia
Mārcellīa, (14) ōrum, n. , fêtes de Marcellus [célébrées à Syracuse] : Cic. Verr. 2, 2, 51 et 154.