Damn, you beat me to it! lol
Presidential trivia was a thing of mine when I was younger. :)
We have had nine monosyllabic Presidential surnames (Polk, Pierce, Grant, Hayes, Taft, Ford, Bush, Bush and You-Know-Who)... for the most part they have run the gamut from the ineffectual to the disastrous, ranking on average 29th out of 44 (counting Cleveland as two terms but one President).
As it turns out, there's an inverse relationship between name length and average ranking -- monosyllabics average 28.89/44, bisyllabics (22 total) average 23.54/44, trisyllabics (12 total) average 17/44, and the lone tetrasyllabic President has an aggregate ranking of 8/44.
Which is more amusing than meaningful, probably. Just fun with statistics, I can't think of any plausible connection.