Ben:
Son:  Benjamin Florian Adams II
Daughter:  Eden Belle Adams

Carlos:
Son:  Henry Roger De Vil
Daughter:  Tonya Anita De Vil

Chad:
Son:  Kyle Gavin Charming
Daughter:  Olivia June Charming

Doug:
Son:  Preston Jasper Dwarf
Daughter:  Allison Victoria Dwarf (I don't know Doug's last name so I thought of it on the spot)

Evie:
Son:  Frank Uriah Queens
Daughter:  Evelyn Ariana Queens (again I don't know her last name)

Freddie: 
Son:  Harold William Facilier
Daughter:  Aubrey Kirsten Facilier

Gil:
Son:  Jeremy Landon LeGume
Daughter:  Naomi Candice LeGume

Harry: 
Son:  James Bartholomew Hook III
Daughter:  Hope Wendy Hook

Jay: 
Son:  James Ryan Fitzherbert
Daughter:  Maya Fiona Fitzherbert (he took your last name; weird I know but let's go with it)

Lonnie:
Son:  Li Daniel Shang (last name comes first...)
Daughter:  Li Brielle Tracy

Mal:
Son:  Emmett Darryl Fairy
Daughter:  Melissa Jane Fairy (still don't know her last name)

Uma:
Son:  Adam Leonardo Seas
Daughter:  Melody Ariel Seas (made it up for her)