Ko Mak is a small island of Trat province, Thailand. It is a subdistrict of Ko Kut district. The island is named after the areca nut, also known as the "betel nut". The first settler on the island was Chao Sua Seng, a Chinese Affairs Officer during the reign of King Rama V, who established a coconut plantation. He sold the plantation to Luang Prompakdii, also a Chines…Ko Mak is a small island of Trat province, Thailand. It is a subdistrict of Ko Kut district. The island is named after the areca nut, also known as the "betel nut". The first settler on the island was Chao Sua Seng, a Chinese Affairs Officer during the reign of King Rama V, who established a coconut plantation. He sold the plantation to Luang Prompakdii, also a Chinese Affairs Officer whose descendants still own the land to this day. Luang Prompakdii and his children are known to have established more coconut and rubber plantations, effectively covering most of the arable land in these two sought-after exports.