What all TV series used twins to play a baby or young child on a series?

Bewitched - Tabitha played by Erin and Diane Murphy
Bewitched - Adam played by David and Greg Lawrence
Full House - Michele played by Mary Kate and Ashley Olsen

Little House on the Prairie - Carrie Ingalls played by Lindsay and Sidney Greebush
Little House on the Prairie - Grace Ingalls played by Wendy and Brenda Turnbeaugh

Modern Family - Lily played by Jayden and Ella Hiller
Raising Hope - Hope played by Baylie and Rylie Cregut
Malcolm in the Middle - Jamie played by James and Lukas Rodriguez

The Waltons - John Curtis Willard played by Marshall and Michael Reed

Lorenzo and Nikolas Brino as Sam and David Camden on 7th Heaven.

Even though Lorenzo and Nikolas were part of quadruplets, all four babies played either Sam or David until they got older.

Little House on the Prairie - Carrie Ingalls played by Lindsay and Sidney Greebush
Little House on the Prairie - Grace Ingalls played by Wendy and Brenda Turnbeaugh

Actually, Wendi spells her first name with an "i" and not a "y". There's no "e" in Turnbaugh, but otherwise you are correct!! Here are both sets of twins then and now!!

The last photo is of both sets of twins with Karen Grassle (Caroline), Alison Arngrim (Nellie), Charlotte Stewart (Miss Beadle), and Hersha Parady (Alice Garvey) at a 2009 cast reunion at Mr. Rushmore.

The Mayer twins played Little Ricky as a toddler on 'I Love Lucy'.

Ashleigh and Blair Sterling played Julie Hale on Getting by
Joseph and Julius Wright played little Richie during season one of Family Matters.
Kimberly and Kara Albright played Meg Sumner McKenzie on Knots Landing*
Joe and Chris Cousins played Bobby Ewing II on Knots Landing*
Dylan and Cole Sprouse played Patrick Kelly on Grace Under Fire
Anthony and Michael Bain of Yes, Dear playing Sammy Warner

* = twins on a dramatic series.