The spelling of the word "reiley" can be a bit confusing. It is actually an uncommon variant of the name "Riley," and is pronounced /ˈraɪli/. The "ei" diphthong sounds like the "i" in "ride," and the "ey" at the end represents a long "e" sound, like the "ee" in "meet." So, while the spelling may be different, the pronunciation is the same as the more commonly recognized version of the name.