Butch, is that a "Lloyd Hale", a "Larry Harley", or a "LittleHen"? No, of course not.
I'm not being a wiseguy, either. If you are just going to make a few knives here and there, then that set of initials is not only fine, it is a nice font and looks real good. If you aspire to someday having your name known, and people seek out your knives, then go with your name so they will know who you are. Addition of your hometwon and state can also be a help until everyone who collects knives knows exactly who the Harner is who needs no more info on his logo. If you were to just use Harner alone, then it's good to get listed in a place likes Knives 200x, the closest we come to a mark registry.
Even someone so famous as to need no more than his "mermaid" still put his name on his knives. How many people on the street or newer knifemakers know who has the shooting star logo?
Just my two cents.