Before her father's rise to the throne (455), she married Sidonius Apollinaris, another aristocrat, who may have been a distant maternal relative.[3] The marriage was highly advantageous for Sidonius, making him part of the most powerful family in the region.[3][5] They had three or four children: Apollinaris, Severiana, Roscia and Alcima (the latter, mentioned only in Gregory of Tours and not in Sidonius' letters, being possibly another name for Severiana or Roscia). A number of Sidonius' letters were addressed to her.[5]
Papianilla brought her husband the estate called Avitacum[6] in Auvergne. Her husband gave away silver vessels from their home to the poor, but she criticised him so he bought them back.[7]