Need help translating to japanese.

[mmicari]

i am looking for our grand childrens names in japanese if any one can help please!!

their names are-female name- finiti
and-male- devin

thank you
mmicari

[Pixel]

The pronounciation may help here

[mmicari]

finiti is the same as infiniti without the "in"
and devin is like devil but with an "n" instead of an "l"