Beyond that, Fido gained some fame of his own in 1865 for attending his former master's funeral - fame that is the origin of the generic name of "Fido" for dogs thereafter, Lincoln having named the dog for a Latin verb that loosely translates to, "to be trustworthy/faithful". This original Fido - though beloved by Lincoln - was adopted in 1861 by the family of Springfield carpenter John Roll (a family friend) when the President-elect felt he couldn't bring his dog along to Washington.
Fido's attendance at the Presidential funeral and the carte de vistes that were sold of his image led to his immediate fame thereafter, but that fame was made permanent when he himself was stabbed to death by a Springfield drunk for whom he was showing concern before the end of that same calendar year (1865) at the age of ten, thus, according to Roll, suffering the same fate as his original human companion - assassination.