The name DUMANJUG - in the old times, in the early spanish regime, there lived in the locality a tuba gatherer named Roman. He was popularly known as Duman, as what the villagers called him.
His tuba was not popular only for its great special taste, but also, it is in demand in the outlying farming and fishing villagers. No event will be successful without Duman's special tea.
Duman was to start working with his tuba early at dawn, and his noise served as his villager's bell to wake up in the morning. The tapping of his "sugong"(a bamboo made into a container for his tuba) was the villager's signal to start to work.
But on morning, however, they heard the unusual rhythm of Duman's working hands. They started to imagine things that could happen to Duman. Coincidentally, it was when some Spaniards were passing in their place. They inquired about the place and was told instead that "si Duman nahulog". Not knowing the local dialect's meaning, the Spaniards took it as an answer to their question, and presumed the place's name as DUMANJUG, a derivation of "si Duman, nahulog."