Jean-Charles Thomas (born 16 December 1929 on Saint-Martin-des-Noyers) received on July 5, 1953, the sacrament of Holy Orders and was incardinated in the clergy of the Diocese of Luçon.
On 13 March 1972 he was named by Pope Paul VI, Titular bishop of Gemellae in Numidia and appointed him auxiliary bishop in Aire and Dax.