"Джеймс" if you want it in cyrilic or "Dzhejms" in romanized version.
In Russian, "Любимая" is how to say/spell sweetheart.
Jim is not a common name in Russia, so there is no official translation for it. However, it is possible to spell "Jim" phonetically. The closest Russian translation would be "Джим" (pronounced dzhim), since there is no equivalent for the letter "J" in the Russian alphabet.
В is at in Russian.
да in the Russian language, or "da" is how you spell it in English
'And' in Russian is spelled 'u'.
In Russian, "Caitlin" can be spelled as "Кейтлин."
"Как ты?" is how you spell "How are you?" in Russian.
Папа is dad in Russian.
Винтовка is rifle in Russian.
Tranquility in Russian is "спокойствие."
Кэти is Kathy in Russian.
Генри is Henry in Russian.