Webbs or Webb's

[Illmattic]

"Being foster parents, the Webbs/Webb’s had a number of children under their roof, including kids they adopted, and many of them..."

Thank you.

 

[MikeNewYork]

Webbs.

 

[emsr2d2]

It works like any other plural. Their surname is Webb. There is more than one person in the family so they are "the Webbs". Using an apostrophe would suggest the possessive which is unnecessary in your sentence.