Probably originating in Galloway, Scotland, Thomas took a university career in canon law in England and France, before taking up service at the court of Avignon Pope Benedict XIII.
[4] The collegiate church of Maybole was founded under the patronage of John Kennedy, Lord of Dunure, a short time before 2 February 1382, when a mandate was issued by the papacy confirming its erection.
[5] A year previously the Lord of Dunure had founded a chapel to St Mary beside the parish church of Maybole, and the erection established a provost, two chaplains and a clerk.
[3] He resigned the vicarage of Maybole through a proxy (Patrick de Houston) at the papal court on 16 February 1398, in exchange with Gilbert Adounane for the church of Kirkcolm in Wigtownshire.
[3] He got papal provision on 5 December 1412, to the politically important vicarage of Dundonald in Kyle, but this was unfruitful as the previous vicar turned out still to be alive.
[16] When he was in Scotland in February 1412 witnessing the foundation charter of St Andrews University, he was said to hold to elevated post of "auditor of the sacred apostolic palace".
[16] As a reward for his service to the "Avignon Pope", now only recognised in Scotland, Sicily, Aragon and Castile, Thomas was provided to the bishopric of Galloway following the death of Elisaeus Adougan, the previous bishop.
There is a mandate, dated 5 September 1415, to the subdean of Glasgow Cathedral, ordering the latter to protect "Thomas and his successors in possession of the lands and heredities of Innermasan, Dyrmor, Innysmocrinyl, Kykkenot, Mirtum and Nicoltum in Candida Casa [i.e. Whithorn] diocese ... which are being molested".
[22] This was made by Bishop Henry de Wardlaw of St Andrews on the request of the Council of Constance, a sign of the waning loyalty in Scotland and perhaps in Thomas to the Avignon papacy.