Im from Hawaii and Ive never heard of a Hawaiian line, But there might be someone calling their line that , Im not sure, But mostly all red red nose and chocolate colored dogs in Hawaii, Are from a breeder by the name of Togashi, they were a ukc registered line way back in the 70's mostly hemphil/wilder stuff for the most part they are a bigger line, males runnin around 60 - 70 pounds, females 50 - 60, when they were first imported to the islands they were performance bred and tested stock, used alot on them big tough Hawaiian boars, also game tested by several breeders, now there mostly an ornamental line like most Ukc dogs. But there are still some good one's of this line to be found, very few and far between tho, I know cause I owned a little 38 pound pure Togashi Chocolate dog that will allways be one of the greatest dogs I've ever owned His heart was bigger than his body, He was all Bulldawg in every sense of the word!
Hawaii now has a serious staff infection do to all the blue dogs imported there, the blue fad caught on in Hawaii like a virus!
Theres also some very well bred Gamestock there too but kept on the down low.
But no I've never heard of the Hawaiian line while I lived there, I have only heard of it recently since I now live in the states.