There are at least three theories on how the chargers got their name, but which is correct is debatable.
The most common theory appears to be that the Chargers were named after the newly introduced Carte Blanche charge card, possibly after a team naming contest or promotion.
Another theory is that original team owner Barron Hilton liked the sound of the University of Southern California Trojans' "Charge!" cheer and named the team after that, but the most plausible theory seems to be that the Chargers are named after the steeds that carried medieval knights into combat. (A knight's horse was known as a "charger") This appears to be corroborated by the fact that the Chargers' original emblem included a profile of a horse's head.
Here is the history of the teams logo
The most common theory appears to be that the Chargers were named after the newly introduced Carte Blanche charge card, possibly after a team naming contest or promotion.
Another theory is that original team owner Barron Hilton liked the sound of the University of Southern California Trojans' "Charge!" cheer and named the team after that, but the most plausible theory seems to be that the Chargers are named after the steeds that carried medieval knights into combat. (A knight's horse was known as a "charger") This appears to be corroborated by the fact that the Chargers' original emblem included a profile of a horse's head.
Here is the history of the teams logo