7:00 PM PT -- Kylie's edited her baby name announcement ... it now says "stormi webster." As we said earlier, Travis Scott's real last name is Webster.

Kylie Jenner and Travis Scott named their daughter Stormi ... according to Mom.

Kylie just posted the name on her social media. As we reported, Kylie's kiddo was born last Thursday at 4:43 PM weighing in at 8 lbs. and 9 oz.

Kylie announced Stormi's birth on Sunday, a couple hours before the Super Bowl. She also posted a video recapping the pregnancy she'd kept under wraps for 9 months.

Stormi arrived at Cedars-Sinai in L.A., the same hospital where sisters Kim and Kourtney delivered their kiddos. Rob's daughter, Dream, was also born there.