The Wikipedia page on Michel Raynaud says that he worked with Grothendieck on the SGA volumes. However, in SGA 1 and 2 the name Mme Michèle Raynaud is given. According to the Genealogy Project, the two are different persons, but I cannot find any further information on Michèle Raynaud. Are there really two Raynauds, or did Michèle Raynaud just become Michel Raynaud at some point?
While Kevin Buzzard's comment is more informative than what I could come up with (not knowing the involved persons) here is some generally accessible information showing that there is a Michèle and a Michel.
First, the MathSciNet author database lists both (and MathSciNet is very good at 'merging' different names even pseudonyms under which one and the same person published).
Second, and more significantly, during a period of several years, sixties/seventies, one can find a variety of papers published by Michèle Raynaud as well as papers published by Michel Raynaud.