when was he born?
Around the year 460 BC
Hippocrates
Historians agree that Hippocrates was born around the year 460 BC on the Greek island of Kos; other biographical information, however, is likely to be untrue.

who was known as the father of medicine Hippocrates of Kos why was he known so? In recognition of his lasting contributions to the field as the founder of the Hippocratic School of Medicine.
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Hippocrates [SEP] Biography
Historians agree that Hippocrates was born around the year 460 BC on the Greek island of Kos; other biographical information, however, is likely to be untrue. Soranus of Ephesus, a 2nd-century Greek physician, was Hippocrates' first biographer and is the source of most personal information about him. Later biographies are in the "Suda" of the 10th century AD, and in the works of John Tzetzes, Aristotle's "Politics", which date from the 4th century BC. Soranus wrote that Hippocrates' father was Heraclides, a physician, and his mother was Praxitela, daughter of Tizane. The two sons of Hippocrates, Thessalus and Draco, and his son-in-law, Polybus, were his students.