The Russian language equivalent of the name Lauren is Лорен (pronounced as "Loren").
The Russian language equivalent of the name Ryan is Райан (pronounced 'ra-yahn').
The Russian language equivalent of the name Dmitry is Dmitriy (Дмитрий).
Клиффорд. Pretty much a direct translation of the name.
The Russian language equivalent of the name Mark is Марк (pronounced "mark").
Douwg
Matvey
Бріттні Brittni
Морин Morin
Juana = Ivana (Ивана)
Чарльз (Charl'ze) is how you would spell the name in Russian, if that's what you mean.
The Russian equivalent of the name Michelle is Мишель (Mishel).