Nikolaos Apostolidis (Greek:Νικόλαος Αποστολίδης; 1856 - 1919), was a biologist, naturalist, professor, dean, author, and politician.

He completed his doctoral studies at the Sorbonne in the field of natural science under the supervision of Henri de Lacaze-Duthiers.

Nikolaos eventually married Sophia Petrou Kiappe the great-granddaughter of German surgeon Heinrich Treiber.

Treiber actively participated in the Greek War of Independence as a surgeon and was one of the doctors who fought for the life of the English poet Lord Byron.

He returned to Greece one year later and became professor of zoology while also teaching natural history at the local high school.