It could indeed be a D'Uccle or a Booted Bantam, and if so its probably the lavender or self blue (or self lavender) variety, your bantam roo could be a lot of things though I vote a OEGB :3
The little brown one who I assume is the one your husband brought home is a bit too early to tell gender, for now I feel like its a pullet. The other little lavender/blue/selfblue one is also indeed a bantam