Mayweather was charged with felony aggravated assault with a deadly weapon, TMZ reports, for the Saturday morning stabbing of Lapattra Lashai Jacobs.
Police sources say Iyanna was arrested at 1:30 AM on Saturday after arriving at the rapper's home and telling the woman that she was Youngboy's fiancee.
Iyanna reportedly told the woman to leave but was instead told to leave by Jacobs.
The two got into an argument that moved into the kitchen, where Iyanna is said to have stabbed the woman twice. Jacobs was taken to a local hospital but her condition is currently unknown