What is "dadia"

Dadia (Greek: Δαδιά) is a village in the northwestern part of the Evros regional unit in Greece. Dadia is in the municipality of Soufli. Its population in 2011 was 533 for the village and 546 for the community, including the village Kotronia. It is located southwest of Soufli and north of Feres. The name originates from a resinous pine wood which in the past was used for lighting.