The Whirlpool Corporation owns a number of brands, including Maytag, Amana and Kitchen-Aid, so some parts might work with multiple brands. However, Whirlpool markets its parts for Whirlpool-branded appliances.
Whirlpool is also the largest manufacturer for the Sears-owned Kenmore brand, and many Kenmore models have an equivalent Whirlpool model. Because of this, replacement refrigerator handles for Kenmore refrigerators might work with Whirlpool refrigerators. However, manufacturers don't typically encourage cross-brand use, so information on compatibility can be difficult to find online or in operation manuals, and parts that look the same might not be compatible. Consumers can inspect the part visually to determine whether it fits.