Scriptural Witness
Susanna is named in Luke 8:1-3, which describes how, as Jesus travelled through the towns and villages of Galilee proclaiming the Kingdom of God, He was accompanied by the Twelve and by certain women who had been "cured of evil spirits and diseases." The passage names Mary Magdalene, from whom seven demons had gone out; Joanna, the wife of Chuza, Herod's steward; and Susanna, together with "many others" who ministered to Him of their substance.
The phrase "ministered of their substance" indicates that these women gave material support and resources to sustain the itinerant ministry of Christ and His apostles. This information is peculiar to Luke's Gospel; the scholar Richard Bauckham has suggested that Luke received it directly from one or more of the women named, most likely Joanna. The notice in Luke 8 forms a literary frame with Luke 24:10, together bracketing the whole of Christ's Galilean ministry.