How did you found out the last name? I was able to figure out only by brute force, so I'm curious on how I was supposed to do it
You can use https://rot13.com to translate the following code.
N ehyr va gur znahny fnlf qrzbaf qba'g xabj nobhg gur thvqr lbh'er hfvat gb yrnea gurve anzrf. Ohg gur ynfg qrzba zragvbaf gur thvqr, fb ubj pbhyq gung or? Ba gur svefg cntr bs gur thvqr (nybat jvgu gur tnzr perqvgf, vg nyfb nccrnef ba gur vgpu cntr) gurer'f n yvar gung fnlf Ovyy jebgr naq erivrjrq gur qrzba snpgf ba gur thvqr. Naq gurer'f na ragel gurer nobhg n qrzba anzrq Ovyy, fb gurer'f n qrzba gung urycrq jevgr gur thvqr naq xabjf nobhg vg. Naq Ovyy'f ragel ba gur thvqr vf shaal jura lbh ernyvmr ur jebgr vg (vg fnlf Ovyy vf vaperqvoyr naq fhpprffshy naq nyfb fhcre uhzoyr).