Historically, AMD's CPU families were given a "K-number" (which originally stood for Kryptonite,[1] an allusion to the Superman comic book character's fatal weakness) starting with their first internal x86 CPU design, the K5, to represent generational changes.
10h and 0Fh refer to the main result of the CPUID x86 processor instruction.
(The "K10h" form that sometimes pops up is an improper hybrid of the "K" code and Family XXh identifier number.)
The Family hexadecimal identifier number can be determined for a particular processor using the freeware system profiling application CPU-Z, which shows the Family number in the Ext.
Family field of the application, as can be seen on various screenshots on the CPU-Z Validator World Records website.