Read Genesis 19:37 Using Other Translations
And the firstborn bare a son, and called his name Moab: the same is the father of the Moabites unto this day.
The firstborn bore a son and called his name Moab.He is the father of the Moabites to this day.
When the older daughter gave birth to a son, she named him Moab. He became the ancestor of the nation now known as the Moabites.