Honu means turtle in Hawaiian. A fact that won't be lost on you once you've seen their ukuleles. Their turtle motif can crop up on the headstock, the body, the fret-markers and even the bridge. The instruments are made by the Big Island Ukulele Company and are distributed by Kala. They used to be made in Hawaii as well, but they are now made in Vietnam with Hawaiian wood. This puts them at the higher end of the mid-range price ukuleles with their cheapest ukulele (the soprano SP-KRGT) at $400 and their most expensive (the Deluxe XXX tenor ukulele) at just over $1,000.
Hawaiian turtles seem to be quite a match for ukuleles so there are ukuleles around that go by the name 'Honu' but aren't Honu ukuleles - for example Luna have a Honu ukulele. So be careful to check you're getting what you think you're getting.
GX9901XX covers Jake Shimabukuro's Crosscurrent on his Honu Super-Deluxe concert ukulele.