I do not want players, coaches or even fans calling me by ANY name, first, last, middle or nick.
An umpire's name is Sir, Mr. Umpire, ump, Blue or "Hey, man". Call me "Umpsie" and you may end up with a warning.
For any official or any sport, display of personal familiarity is a curse and add absolutely not positive aspects to the game the individual has be assigned to officiate.