There is a Saint Farnan here in Kildare whose feast day is february 15th.
That's interesting. I will have to look into this saint further to see what relationship, if any, he has to the Saint Faranann listed here. I think there is a Faranann listed among the abbots of Kildare.
Who is the Irish woman saint who carries a square symbol on her staff?
Off-hand I don't know, do you have an image or a reference for me to follow up?