I have french ancestors what does the name DANDURAND mean and was it shortened?

Answer 1

The name is fairly frequent in the south-west of France (see second URL listed below).
Varieties of spelling : Dendurent, Danduran, Dandurant.
Meaning this name is a patronym: "son of Andurand (Anduran, Andurant, Enduran)".
That other name Andurand in its turn has two possible roots: either referring to someone very resilient, steadfast, enduring (French: "endurant"), or the surname "Durand" (in itself one of the most frequent French surnames, derived from Latin "Durandus", probably a Latin translation of a Germanic name) with the addition of the Occitan preposition "en" (referring to a somewhat higher social rank).