It's a de Watermael. Like the boots of the d'uccle, the crest of the de watermael sometimes shows in with two "normal" d'anvers if both have one of the other breed in their lineage. This or the "milk man" maybe the reason why one of your chicks has a crest.
Oh, yeah, I remember! JJ was working on that breed. I don't know if Aubrey has any or not, can't remember. Aubrey!!! Calling Aubrey Webb!! @Boggy Bottom Bantams !