[Argus]

the descendants of the slaughtered Templars

I think their monastic vow of chastity would have precluded descendants, at least legitimate ones.

[Spktyr]

Many monks of the era had families before they became monks.
I would assume it was no different for the Templars.

[Melchior]

Many who joined the Templars in the Holy Land left the active organization on return to Europe. There the Templar organization funded cathedrals, abbeys, hospitals, etc. Only the Knights on duty, so to speak, were expected to observe celibacy.

[Pontiac]

I think their monastic vow of chastity would have precluded descendants, at least legitimate ones.

Normally a dissolved order’s property should be returned to the mother church.

So France owes the Roman Catholic Church likely in today’s money trillions of dollars.