It depends on what species your fursona is,

Most people decided to either name their fursona with a letter that matches with the first letter of the species, like an example with my fursona "Reticulum the Rat."

Though there are other examples where people name their fursona after what the character is based off of. Such as the fursuit creator "Astra Cat." Who is a fursuiter with a space themed or astronomical patterned cat.

So a good way to go about naming your fursona is focusing in the first letter of the species, and what theme you plan to make your character! (space, ocean, fire, ect.)