Cops have arrested four men in the shooting death of an innocent bystander from Staten Island who got gunned down on the same block where she’d survived getting hit by a stray bullet 20 years earlier, authorities said Tuesday.

Four men are in custody for the July 10 slaying of Fran Williams.

The murder suspects are Sean Oliveras, 23, Isaiah Kelson, 22, and Jaleel Hewitt, 26. The fourth suspect — Marquise Ancrum, 22 — was charged with criminal facilitation.

All of the men are from Staten Island, cops said.

Williams had been waiting for a bus on Jersey Street in New Brighton when she took a stray bullet to the face during a gang-related gun battle, according to police sources.

The shooting unfolded on the same street where the beloved aunt had been hit by another stray bullet while doing laundry in 1998, the sources said.

The fatal shooting allegedly stemmed from a fight that broke out earlier in the day inside the Staten Island Courthouse between gang members.