Tobar na Trionaid Tobar na Trionaid Context According to the OS Name Books (OS1/18/8/93): ‘This name signifies The Trinity Well and is applied to a Well situated about 12 chains to the south-west of Teampull na Trionaid.’ See Teampull na Trionaid for a full discussion of this site. Grid reference: NF814601 Meaning G tobar ‘a well’ + G trianaid ‘trinity’ (The Well of the Trinity) Early forms OS 6-inch Tobar na Trionaid (given as head-form)