What does Aloha no kakou mean?

aloha = love, greetings, farewell

no = if it's just "no" without a horizontal line over the "o", it can mean "from"

if there is a line, it means "indeed"

kakou = us (3 or more people), can also mean "all of us"

So:

Aloha no kakou: Love/Greetings from us/all of us.

(With a line over the "o" in "no"): Love/Greetings indeed to us/all of us.