>>15682178Origin
Gardevoir resembles a ballroom dancer. Its exaggerated head with minimal facial expression and an overall frail, featureless physique could also be attributed to anesama ningyou, a style of traditional Japanese paper doll. Its protective nature over its Trainer may suggest that it is based on a guardian angel, though its ghost-like characteristics could also suggest that it is based on ghosts that refuse to leave this world.
Name origin
Gardevoir may be a combination of garde (French for guard) and devoir (French for duty). It may also be a combination of garder (French verb for to keep) and voir (French verb for to see), reflected in its Pokédex data, which explains how Gardevoir will protect its Trainer even at the cost of its own life and that Gardevoir has the ability to see into the future.
Sirknight may be taken to mean さあ、ナイト saa, naito ("come, knight") or Sir Knight.
(bulbapedia)