In "The Originals," Aurora de Martel (born Aurora de Vincent) was sired into vampirism by Rebekah Mikaelson, not by one of the male Original brothers. Aurora was a princess from the 12th century who fell in love with Elijah Mikaelson but was actually closer, and eventually turned, by Rebekah after the two women became close friends and confidantes. Rebekah completed the transition by feeding Aurora her blood after Aurora died, making Rebekah her sire.
This connection is significant to the show's mythology because being "sired" to an Original vampire creates a psychic and emotional bond — a sired vampire's personality and emotional stability can become tied to their sire's feelings toward them. Aurora's storyline leaned into this: her obsessive devotion to Rebekah (and her romantic history with Elijah) fueled much of her unstable, vengeful behavior throughout the series, particularly her rivalry with Hayley Marshall and her role in various schemes against the Mikaelson family, including her manipulation of Klaus's back-story with the werewolf curse centuries earlier.
It's worth noting that Aurora is sometimes confused with other characters due to the complicated web of sire bonds and family ties in "The Vampire Diaries" and "The Originals" universe, but canonically, Rebekah Mikaelson is confirmed as the one who turned/sired Aurora de Martel into a vampire. This is distinct from the werewolf gene or witch lineage — sire bonds in this universe apply specifically to vampires and denote who turned them into a vampire, which then can create emotional dependency depending on the strength of feeling involved between sire and progeny.