who is this this last person?
The probable owner of the barony of Inverarity, the church there.
Walter de Coventre
 Abernethy. Margaret had patronage over both the church of Abernethy and, as probable owner of the barony of Inverarity, the church there.
who was walter de coventre? A 14th-century ecclesiastic. where was he from? It is speculated that he may have been from Abernethy. from where did he complete his education? He did his B.A. from the University of Paris and studied civil law from the University of Orléans. any information regarding his background? According to D.E.R. Watt, Walter might have two brothers- John and William. He might also have been connected to Margaret de Abernethy.
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Walter de Coventre [SEP] Origins and personal background
On 7 December 1345, a William de Coventre, also from the diocese of Dunblane, held a canonry and prebends (a cathedral priesthood with stipends) in the diocese of Ross and the Collegiate Church of Abernethy, when he was granted the church of Inverarity that had previously been held by John de Coventre. William thus appears to have succeeded John (and later Walter succeeded William) to all of these benefices. Watt suggested that all three were brothers, John the first-born, William the second-born, and Walter the youngest of the three. He further suggested that the family was probably closely connected to Margaret de Abernethy, heiress of the old lay abbots and lords of Abernethy.