Celer, (1), proconsul of Africa A.D. 429, is addressed by Augustine (Hist. 56, 57, or 237, 210) as a Donatist. He was anxious to know if the African Donatists had any good reason for severing themselves from the Catholics. (2) Martyr of the primitive Welsh Church, was patron of Llangeler, in Carmarthenshire.