Dr Wilhelm Weinberg (Stuttgart, December 25, 1862 – Tübingen, November 27, 1937) was a German physician and obstetrician-gynecologist, practicing in Stuttgart, who in a 1908 paper (Jahresheft des Vereins für vaterländische Naturkunde in Württemberg (Annals of the Society of the National Natural History in Württemberg) published in German, expressed the concept that would later come to be known as the Hardy-Weinberg principle.
Weinberg is also credited as the first to explain the effect of ascertainment bias on observations in genetics.