Reply To: Tefillin Shel Rosh poll

I tie a single dalet because my father does though the fact that the Rambam says the knot is “square like a dhol” and that two communities known for best preserving ancient minhagim in both Ashkenaz and the Mideast use the double seems to suggest that was the original custom. It is interesting to note that the Yemenite/Yekke double dalet is tied differently than the Hungarian one. It has been suggested that the Hungarian knot changed because the inside of the Yekke/Yemenite double dalet looks like a cross.