How Do I Translate A Name Into Latin?

I have studied Latin on and off for years...Latin has 3 genders: Male, Female and Neuter. The Male ending is usually "-us","-ius" or "-o"; The Female ending is usually "-a" or "-ia"; The Neuter ending is "-um" (for things not people).

The other factor in "Latinizing" a name is removing the Germanic and other language changes, like double consonants and other irregular combinations of vowels and consonants.
Here are a few examples:
--Michael becomes Mikaelus
--Mark becomes Markus
--John becomes Johan or Johanus
--Hartley becomes Hartlius....

If this does work Google the phrase "What is the origin of the name ________(you choose it)?" If its origin is Latin you'll have it if it some other language Google the meaning and then Google the result asking for a latin equivalent.

I want to translate these names into latin so i can have them done for a tattoo. Joshua,Ashley and Sarah

Jose antonio