According to sources, the first families to settle in the town were Ga, Ventura, Ecunar, Gealogo, Jarligo, Geraldino,Ensomo, Gier, and Eviota.

It even reached to the point that they managed to steal the bell of the Immaculada Concepcion Parish, the only church in the town then, and dumped it in a well situated on what is now sitio Busay in Barangay New Mabuhay.

But the Moro pillaging was eventually stopped by the first gobernadorcillo of the town, Pedro Ga Ventura, along with his brother Leon through estukada or fencing using linantip, a variety of bolo.

The town became more populous than ever after the foundation of the Philippine Benevolent Missionaries Association, headed by the Ruben Edera Ecleo Sr, which also served as a mayor of Dinagat from 1963 to 1987.

[6] On October 24, 2012, however, the Supreme Court reversed its ruling from the previous year, and upheld the constitutionality of RA 9355 and the creation of Dinagat Islands as a province.

La isla Calaveras (Pulo), an island near Tagbuyakhaw, was used as a mass grave for people killed by brutal Japanese occupiers during World War II.