Part WP74007399, Igniter, is a genuine OEM part manufactured by Whirlpool. The manufacturer describes it as “IGNITER- B”. Igniter for oven burner.
Whirlpool manufactures different brands that my include:
Admiral, Amana, Caloric, Crosley, Dacor, Dynasty, Estate, Gaggenau, Glenwood, Hardwick, Ikea, Inglis, Jenn Air, Kenmore, KitchenAid, Litton, Magic Chef, Maytag, Modern Maid, Montgomery Wards, Norge, Roper, Sharp, Speed Queen, Sunray, and Thermador.
These brands may share the same part number for repairs. Some parts are compatible with different types of appliances (washing machine might share the same screw as a dryer). As long as the part number matches, it will be compatible with your repair.