Vadim Simovitch

Life leading up to The Sims 2
Little is known about Vadim Simovitch, as he was never intoduced into The Sims, and is deceased long before the start of The Sims 2. He was married to Fatima Simovitch, as we see on his family tree. Together he and Fatima had a daughter, Betty Simovitch, who is intoduced as Betty Newbie in the tutorial of The Sims. Vadim is the grandfather of Betty's daughter,  Brandi, who was fathered by Betty's husband, Bob Newbie. Vadim is also the great-grandfather of Brandi's children;  Dustin,  Beau, and an unborn son.

NOTE: Vadim's daughter, Betty, was introduced to console versions of the game as Betty Roomie.

Life leading up to The Sims 3
In the Sims 3, Vadim Simovitch is an adult who is married to his wife Fatima Simovitch. He has a daughter with her, Betty Simovitch (Betty Newbie). Vadim and his wife Fatima have a troubled marriage and argue and fight all the time.