A "popular nickname" refers to a name or term that is commonly used by many people to refer to a person, place, or thing, often as a familiar or friendly way of addressing them. Full definition
Popular nicknames for Abigail include «Abby», «Gail», «Gayle», «Abbey», and «Abbie». (babygaga.com)
That's one of the most popular nicknames in California and many schools with it also use Indian logos. (sportstarsmag.com)
Due to a lot of users confusing BitcoinCash (BCH) with the real Bitcoin (BTC) we have renamed BitcoinCash to it more popular nickname BCash. (getrevue.co)