Take a look at the Family Tree
Grams
For many years Grams, otherwise known as Penny Halliwell, was the head of the Halliwell home. She was an extremely powerful witch who raised her daughter, Patty, in the Wiccan ways. After Patty was killed, Grams raised Prue, Piper and Phoebe, the children Patty had left behind. Unfortunately, the kids never got a chance to learn the same skills their mother had. Grams had bound their powers many years before to keep a warlock from stealing them. It wasn't until Grams died and the sisters' reunited, that they finally reclaimed their powers. It seems that Grams still watches over the girls, occasionally providing a little help from beyond the grave.
Patty (Mom)
Patty Halliwell was Prue, Piper, and Phoebe's mother. She had the same power as her middle daughter, Piper, the power to freeze. Sadly, Patty was killed by a water demon when her children were very young and she never got a chance to see them grow up. She did meet her adult daughters once though, when they returned to the past to help stop an evil warlock from gaining immunity to their powers. This was a momentous occasion for Prue, Piper and Phoebe since their mother's death had always been the darkest moment in their lives. Seeing her again was both wonderful and painful. Youngest daughter, Phoebe, even left a note warning her mother of her impending death. But at the last minute Phoebe took the letter back, realizing that she could not change history.
P. Russell
This Warren ancestor--Phoebe's soul in a past life--lived during the twenties, operating a small business selling love potions and telling futures at a speakeasy she owned with her two cousins, and her power was throwing fire. A powerful warlock named Anton seduced her and convinced her to help him kill her cousins so that he might obtain their powers. Her cousins learned of their plan and killed her, but not before cursing her so that she and Anton, who was immortal, would never join forces in any lifetime.
P. Baxter
One of Piper's past lives, this witch also had a similar power: she could slow time, but not stop it. She owned a speakeasy in the twenties with her cousins, taking responsibility for obtaining the liquor for the establishment. Her husband also worked in the speakeasy, playing piano.
P. Bowen
This witch had the power to freeze, literally, and was one of Prue's past lives. During the twenties, she ran a speakeasy with her cousins and was a photographer.
Melinda Warren
The beginning of Halliwell magic, Melinda Warren was born in Virginia, but later moved to Salem, Massachussetts. She possessed all three of the Charmed Ones powers: telekinesis, premonitions, and the power to freeze. She was tricked by a warlock named Matthew Tate who copied her powers and then turned her in to the witchhunters. Melinda managed to curse Matthew into a locket, but she was hanged in the Salem witch trials.