What is the meaning of Patka?

A head covering worn by Sikh boys, and by Sikh men either alone or as an under-turban.

diminutive of pata

flap (strip of material sewn or pinned to a garment, used to tighten a loose part of it or as a decoration)

duck (female)

tufted duck (Aythya fuligula)

northern shoveler (Spatula clypeata)

Source: wiktionary.org