Semper Fidelis is Latin for "Always Faithful" or "Always Loyal". Well known in the United States as the motto of the United States Marine Corps (and often shortened to Semper Fi in Marine contexts), Semper Fidelis has served as a slogan for many families and entities, in many countries, dated to have been started no later than the 16th century. Within the groups below, users are listed in chronological order according to when they are believed to have adopted the motto; however, in many cases dates of adoption are not well established.
