Abraham Darby II (1711-1763) was an English iron-master whose foundry at Coalbrookdale in Shropshire produced the iron for Thomas Newcomen's steam engines.
Abraham Darby III (1750-1791) was an English iron-master who improved the art of iron-smelting. His most famous achievement was the building of the world's first cast-iron bridge, over the Severn at Ironbridge.