In ancient Egypt, shaving your eyebrows was a sign for mourning over a dead cat.

In ancient Egypt, people shaved their eyebrows as a sign of mourning when their cats died.

More info: They also mummified their dead cats the way they mummified people The Egyptians revered cats so much that if a human killed a feline, either intentionally or unintentionally, that human was sentenced to death.

Laws were set that also forbid the exportation of cats, though they were frequently smuggled out. Armies sometimes were set out to recapture these cats from the foreign lands.