This was drawn for me by Fate209

Full picture:

Left to right: Heatherstream, Hurricane, Storm, Glow.

Zoom in on the 2 H's:

Zoom in on the kits:

Heatherstream: Female.
Hurricane: Male.
Storm: Male.
Glow: Female.

Their full names are:
Heatherstream
Hurricane that destroys nature.
Storm that tears leaf.
Glow of setting sun.