From Gaslamp Ball Wiki - A Wiki for San Diego Padres Fans

Hermanos is Spanish for "brothers".

Due to the propensity of the San Diego Padres to have brothers play with each other on the same Padres team, many have campaigned for the team to change their name from "Padres", which means fathers (or priests) in Spanish, to "Hermanos" to better reflect the players on the team.