The Kama family is a wealthy and respected pure-blood wizarding family of Senegalese origin. Their story is primarily defined by a tragic feud with the Lestrange family, which culminates in a sworn quest for revenge carried out by their last known descendant, Yusuf Kama. The family's history is central to the plot of Fantastic Beasts: The Crimes of Grindelwald. All information regarding the Kama family comes from the Fantastic Beasts film series and its related materials, as they are not mentioned in the original seven Harry Potter novels.
The Kama family's tragic history was set in motion when Corvus Lestrange Sr., a powerful and cruel wizard, became obsessed with Mustafa Kama's first wife. Using the Imperius Curse, Corvus Sr. abducted her, leaving her husband and young daughter behind. The enslaved woman later died while giving birth to a daughter, Leta Lestrange. (FB: The Crimes of Grindelwald) Devastated by grief, Mustafa Kama eventually remarried a witch named Laurena, and together they had a son, Yusuf Kama. On his deathbed, Mustafa extracted an Unbreakable Vow from a young Yusuf, compelling him to avenge the family by killing the person Corvus Lestrange Sr. loved most in the world—his son, Corvus Lestrange Jr.. (FB: The Crimes of Grindelwald) This vow consumed Yusuf's life. He dedicated himself to tracking down the Lestrange heir, a search that eventually led him to Paris. There, he mistakenly identified Credence Barebone as the long-lost Corvus, intending to kill him to fulfill his father's dying wish. The full extent of this family history was revealed by Yusuf through a magical, moving diorama that emerged from his family's box. (FB: The Crimes of Grindelwald)
The Kama family's primary relationship is its feud with the Lestrange family. This one-sided antagonism was initiated by Corvus Lestrange Sr.'s abduction of Mustafa Kama's wife. This single act resulted in generations of pain, culminating in the Unbreakable Vow that pitted Yusuf Kama against the supposed Lestrange heir. Yusuf's relationship with his half-sister, Leta Lestrange, is deeply complicated. While they share a mother, Yusuf's vow initially placed him in an adversarial position toward her family. However, after learning the truth that Corvus Lestrange Jr. had died as an infant, the vow was seemingly voided, allowing Yusuf to abandon his quest for revenge and ally with Leta and her companions against Gellert Grindelwald. (FB: The Crimes of Grindelwald)
“Kama” is the name of the Hindu god of love, desire, and pleasure. This serves as a deep irony, as the Kama family's story is not one of love, but of love stolen, leading to a dark obsession with revenge. The name also has roots in various African languages and cultures.