Alfie
Arthur
Ben
Bertie
Bill
Bulgy
Bulstrode
Butch
Caroline
Chinese Dragon
Cranky
Daisy
Derek
Diesel
Diesel 10
Donald
Duncan
Duke
Edward
Elizabeth
Emily
Fergus
Gordon
Harold
Harvey
Henrietta
Henry
Iron'arry
Iron Bert
Jack
James
Lady
Lady Hatt
Mavis
Murdoch
Oliver
Percy
Peter Sam
Rheneas
Rusty
Salty
Sir Handel
Sir Topham Hatt
Skarloey
Spencer
Splatter
Thomas
Toby
Troublesome Trucks

Donald
Other than their name plaques and numbers, Donald and his brother Douglas are twins. Donald hates to be parted from his brother, and loves to play practical jokes on the other engines.

Fun Fact
Sir Topham Hatt had ordered one goods engine from Scotland, but was surprised when both Donald and Douglas showed up.