How Dungon got its name?

A sample of a maturing Dungon Tree. (Copyright RAFI)

One possible origin of the name Dungon maybe the abundance of Dungon tree, Scientific Name: Heritiera sylvatica[1],  in the region as this type of tree can be found in forests at low and medium altitudes.

In the construction and outfitting of the boats for the Balangay Expedition in 2009, it was reported that the team sourced this type of trees from the Eastern region of Tawi-Tawi [2], the area where Dungon the historical place is situated.

References:
[1] http://rafi.org.ph/greenin-philippines/green-almanac/dungon/

[2] http://www.sail-world.com/Ancient-Balangay-sailing-vessel-sets-out-on-four-year-saga/58368 and https://groups.google.com/forum/#!topic/soc.culture.filipino/ud8_tCfLjqU