As praised in the spell to vanquish the Source, Astrid, Helena, Laura and Grace were all powerful ancestors of the Charmed Ones. Their connection to the other Warren witches, their lives and their powers all remain unknown.

A theory as to why the Charmed Ones included these ancestors in the vanquishing spell is that they had to call upon all ancestors who would, at the time, be in spirit form and not, as of yet, be reincarnated into their next life. This would explain why they did not contact the 1920s cousins (as they have all been reincarnated into the spirit form of Prudence - who was contacted - and the living Piper and Phoebe).

According to Patricia Halliwell in, her daughter, Phoebe, was named after 'her favourite aunt'. Many argue that she could be Patricia's great-aunt because Penny had no sisters. "Aunt Phoebe" could conceivably have been one of Allan Halliwell's sisters, or one of the 1920s cousins, especially P. Bowen as she died in the 70s allowing the pair many decades to closely bond together. Although P. Bowen is actually Patricia's first cousin twice removed, not an aunt, it is not implausible that Patricia could have affectionately called her "Aunt" Phoebe.

According to Phoebe Halliwell, a couch in the family manor's attic belonged to their Aunt Pearl. Some theorize Pearl could be the name of one of the 1920s cousins (as all three of them lived in or frequented the manor). Again, although P. Bowen and P. Russell were actually Phoebe's first cousins thrice removed, they might have been referred to as aunts by other family members or simply for conveniance.

According to Piper Halliwell, the sisters have a great-aunt Sylvia who collects Hummels, as it is easier to deal with them than with real people. Piper says "who collects", implying that Sylvia is currently alive. Due to the reference of 'dealing with real people', one might assume that her magical life (if she has one) conflicts with mortals around her. This may be the "manic aunt" Piper refers to in the first episode, along with a "cousin who's a drunk" and "a father (Victor Bennett) who's invisible".

Janice Halliwell, not part of the Warren line, nor a witch, was Allen Halliwell's sister, therefore the sisters' great-aunt. According to her brother, she looks extremely similar to the Charmed One, Paige Matthews). This could imply that Janice was Paige's past life.

According to Leo, Hubert, Milton and Clarence were the names of husbands of the Warren Witches. He read these names from the Warren family tree, however, the entire tree teems with continuity errors [including the claim that Melinda Warren had two daughters, that the Charmed Ones had male Warren ancestors (in particular Grams' 'brother' and 'great-uncle', despite the fact that she had vowed no men were born into the Warren line), naming Allen Halliwell as 'Jack', wrongly claiming that Brianna Warren was their great(x5)-grandmother as opposed to their great(x3)-aunt (though there could have been more than one Brianna in the family, one being the great-granddaughter of the other), not having Melinda Warren as their great(x6)-grandmother but as their great(x15)-grandmother, as well as many incorrect birth and death dates].