Yvonne Le Guillou is identified by several sources (see here) as one of a group of 9 young women who escaped from a Death Match between Leipzig and Colditz in April 1945. Yvonne is the only one of the 9 for whom no more details about herself or her family have been found. I searched the 10-year index tables for all 20 arrondissements of Paris around her alleged birth date, and did not find her (she might have been born out of wedlock under a different name. Or she might have been born somewhere else and later vaguely called "Parisian"). Worse, she is nowhere to be found in the SGA-Mémoire des Hommes database; although as a deported Resistance member she definitely should be (I searched under Guillou, Le Guillou and Leguillou, as well as Dupont). A similar enquiry into her husband in the SGA database did not help. There are no Duponts called William (that might be a nickname or alias) and too many called Lucien. In short, we are stuck with an Yvonne Le Guillou with possibly an inaccurate LNAB, an inaccurate place of birth, no death information and not even Ministry of Defence information. Can you help? Where else could we look? (Tagged Netherlands because she is said to have worked with a Dutch resistance network).
Could be her: https://deces.matchid.io/id/l267gfC0oYBC. Not really born in Paris...
