My interpretation is that the complainant's name is exactly one letter, and it is an accented one, e.g. Õ.
Or Ě.
Or Ů.
sorry, i phrased it poorly. my name has more than one letter, but includes one accented letter.
That was my interpretation as well. I was making a joke that the OP said his name had one letter, then indicated that his name was "jesus christ". (All lower-case, too!)