No, they do not. Plenty of nieces, nephews, and godchildren, but no children of their own.
There are three novels, JUMPER, REFLEX, and JUMPER: GRIFFIN'S STORY. JUMPER: GRIFFIN'S STORY came out after the movie JUMPER (the story takes place before the movie timeline). The movie introduced paladins who have been chasing and killing jumpers throughout history. In JUMPER: GRIFFIN'S STORY, Gould updated the series with paladins. Paladins were not his idea, but he accepted them as part of the Jumper universe after the movie included them). There was also a graphic novel, JUMPER: JUMPSCARS, (written by Nunzio Defilippis and Christina Weir, illustrated by Brian Hurtt -- not written by Gould) that is a prequel to JUMPER: GRIFFIN'S STORY and the movie.
The address of the Weir Public Library is: 612 South Jefferson, Weir, 66781 0248
Molly Weir's birth name is Mary Weir.
Bill Weir's birth name is William Francis Weir.
Johnny Weir's birth name is John Garvin Weir.
Kyle Weir's birth name is Kyle Andrew Weir.
Weir Revie's birth name is Andrew Weir Revie.
Stephnie Weir's birth name is Stephnie Carmel Weir.
Emily Weir's birth name is Emily Bianca Weir.
Stephen Weir died in 1969.
Stephen Weir was born in 1905.
Cecil Weir was born in 1897.