Iyanna, 19, was busted on charges of felony aggravated assault with a deadly weapon, law enforcement sources told TMZ.

The undefeated boxing legend’s daughter allegedly went to Youngboy’s Houston, Texas home at about 1:30 a.m. and confronted a woman who was with him, identified by TMZ as Lapattra Lashai Jacobs.

Iyanna claimed she was Youngboy’s fiancee and told Jacobs to leave the house — then allegedly charged at her with two knives, stabbing the woman twice, the outlet reported.

Iyanna told cops she’d never met Jacobs, but that the victim had provoked her by yanking her hair before the alleged attack.

Jacobs was taken to a nearby hospital, TMZ said.

The incident comes three weeks after Floyd Mayweather’s ex-girlfriend, 40-year-old Josie Harris, was found dead in her car outside her California home.