Rallus is a genus of wetland birds of the rail and crake family Rallidae.

1/ Water rail (Gà nước, Rallus aquaticus) 

2/ Brown-cheeked rail or eastern water rail (Gà nước Ấn Độ, Rallus indicus)

Gruiformes, Gruidae: from the Latin word grus meaning "crane".
Rallidae: from rallus new Latin for rail, an aquatic bird.
The genus name Rallus comes from the pre-binomial Latin name Rallus aquaticus for the water rail, or possibly from French rale, related to a rasping sound, with potential roots connecting to Greek krekein (to weave) for the bird's sound/motion, but the exact etymology of the word is uncertain.