Lynn
Latin - Iacobus.
Gemma is the Latin word for "gemstone; jewel'.
Donati (if you don't trust me go on to google translate)
reddo is latin for translate.
Strangely the modern name Jack derives from Latin Jacobus, which is the Latin version of James. All these names derive from Hebrew Jacob, meaning "one who supplants" - someone who overthrows someone else.
Jasonus McDonoughdi is the name Jason Mcdonough in Latin or Greek.
Cristina Hecert
It was probably a Latin word. If you can, check a Latin dictionary and translate.
Jack = Jacques, however, Jack is an abbreviation of John, so; John = Jean
Amanda itself is actually Latin. In Latin, Amanda means 'she who must be loved.'
You could just use Mina, but the plural of this word (minae) is Latin for 'threats'.