Elgood, "Hindu arms and ritual", p.243
"Dab: (Rajastan). Local name for a variety of hafted weapons such as Bhuj or unusual axe forms"
I tried once to offer a Brahmin (Boston) pronounciation (Dahb) but no one was impressed
Still, don't you think that the SE Asian Dha (or Darb, as Mark insists) fits the description rather well?
What do we know about Rajastani/SE Asian contacts?