Apologists are authors, writer, editors of scientific logs or academic journal, and leaders known for taking on the points in arguments, conflicts or positions that are either placed under popular scrutinies or viewed under persecutory examinations. The term comes from the Greek word apologia (????????), meaning a speaking in defense.
Notable apologists
Plato (Greek: ??????, Plát?n, "wide, broad-shouldered") (428/427 BC[1] ? 348/347 BC), whose actual name was Aristocles, was an ancient Greek philosopher, the second of the great trio of ancient Greeks ?succeeding Socrates and preceding Aristotle? who between them laid the philosophical foundations of Western cultureQuintus Septimius Florens Tertullianus, anglicised as Tertullian, (ca.155?230) was a church leader and was a notable early Christian apologist. He was born, lived and died in Carthage. He was the first great writer of Latin Christianity, thus sometimes known as the "Father of the Latin Church". He introduced the term Tri
Source:
http://en.wikipedia.org/wiki/Apologist