Erasmus Darwin (1731–1802) was a physician and poet and grandfather of Charles Darwin Erasmus Darwin may also refer to: Erasmus Alvey Darwin (1804–1881), grandson of Erasmus Darwin, brother of Charles Darwin Erasmus Darwin IV (1881–1915), son of Horace Darwin, grandson of Charles Darwin See also Erasmus Darwin House, house of Erasmus Darwin in Lichfield Erasmus Darwin Barlow (1915–2005), great-great-great-grandson of Erasmus Darwin Erasmus Darwin Keyes (1810–1895), apparently unrelated