Another tomb of the Lords, at Coustaussa?

While doing some preliminary research about Coustaussa i came across references to a 'tomb of the Lords' in/under the church at Coustaussa.

One François de Montesquieu, seigneur de Trilla, made a will before his death. This document says that 'François demanda à être enseveli dans le tombeau de ses ancêtres dans l'église de Coustaussa' [Francis asked to be buried in the tomb of his ancestors in the church of Coustaussa.] This essentially amounts to another Tomb of the Lords just like the one at Rennes-le-Chateau. 

The son of this François also wrote in a document "que s'il en mourait, il voulait être enseveli dans l'église Saint-Michel de Coustaussa, dans le tombeau de son père François, seigneur de Trilla." [ that is " if he died, he wanted to be buried in the church of Saint-Michel Coustaussa in the tomb of his father Francis, Lord Trilla"].

It's interesting that Coustaussa is claimed to be founded on Visigothic foundations, just as the little church at Rennes is. Viz: "Il semble, comme dans de nombreux site de la région, qu'un site wisigoth existe en ce lieu dès 730". So resembling its sister church at Rennes-le-Chateau - which also has a 'tomb of the Lords' and is alleged to be of Visigothis origin,  Coustaussa differs in that it does not have a legendary association with 'treasure'

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