Shallot relatives are two vegetables that are closely related to the shallot. Onions (6 letters) and leeks (5 letters) are both members of the Allium genus, which also includes garlic, chives, and shallots. Onions are a bulb vegetable with a strong flavor and are used in many dishes around the world. Leeks are a milder-tasting relative of onions and are often used in soups and stews. Both onions and leeks are popular ingredients in many cuisines.