Any Architecture/History Buffs That Might Help Me?

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Im writing a tour for my job about a neighborhood in Brooklyn known as Lefferts Manor. I was walking around today and noticed a certain architectural detail that kept popping up over and over again on the outside of many of the homes in that neighborhood.

I tried googling it, finding what the Lefferts family crest was, or the crest of the Netherlands (where the Lefferts family originated from), but I cant seem to figure it out on my own. I dont know if its just a design or if its related to the family/country of origin. Just to put it out there, maybe one of you guys happen to know.

I dont know why I didnt take a photo of it... but it basically is like a crest, with a flower on one part, it looks like a poppy maybe? And in the other part it looks like a fleur de lys or maybe a wheat bundle? Above the crest part, it is like a profile of a knight / knight's helmet.


It looks something like this quick and sloppy sketch i just made:



Anyone have any ideas?

Thanks!

If the flower looks like or could be a poppy maybe it could have something to do with the County of Flanders which is and was apart of the Lowlands in Northern Europe.