porridge (n.)
1530s, porage "soup of meat and vegetables," alteration of pottage, perhaps from influence of Middle English porray, porreie "leek broth," from Old French poree "leek soup," from Vulgar Latin *porrata, from Latin porrum "leek." Spelling with -idge attested from c.1600. Association with oatmeal is 1640s, first in Scottish.