Usually male names start with S (and often end in K). Surak, Sarek, Spock, Stonn. Female ones usually have the T'P thing as a prefix. T'Pau, T'Pol, T'Pring, T'Plana Hath, T'Pel. And then you have oddities like Tuvok. Wouldn't a male version be more like Suvok? And of course , Saavik, a female character. I know human names fluctuate wildly and there are no rigid rules for naming your children. It's just an interesting observation about Vulcan names.