Abiathar and Sidonia were a legendary Jewish priest of Mtskheta and his daughter.
An apocryphal account of the life and miracles of Saint Nino is attributed to them.
It is said that after the death of Christ his Robe was carried to Mtskheta by Elioz, Sidonia's brother.
After having listened to her brother's grief story about the death of Christ she "clutched the Robe to her breast and immediately gave up her spirit".
The name "Abiathar" is derived from a Biblical character, a priest of the Jerusalem Temple in the time of King David.