there are quite a few branches of hung fut pai.
it is generally believed that the original concept of hung fut was from the hung hsi guan lineage.
the style history, from what i have been taught, and speaking to others of different lineages, follow that it first came into notice around hsien feng reign in the ching dynasty, in the ho-nan district of canton.
the si-jo is wu hia tung. wu hai tung is said to have brought the style to canton from shiao sing county.
wu hai tung, passed the style onto hung chiu shing.
the style became known and popular by wu hai tung, when he moved to hong kong in yuen long.
from there two of his sons and some of his students promoted the style.
it also was popular in many other southern provinces.
from this lineage, there is a very well known hong kong sifu, called yim tai who moved to america many years ago.
i’m am told that he has a web site, although i have never actually seen it.
yim tai was taught by a very famous hung fut player in hong kong, hung yiu chung, maybe someone on here can tell you where to find the site.
yim tai’s hung fut, has many forms, to where my hung fut, from a family style, has few froms, and has the traditionals 18 weapon forms, with some odd, village weapon forms
hung fut is known as the left side system, due to its disposition of movement with the left side of the body, great if your left handed, but rather interesting if your right side favoured, really brings the balance into perspective
good luck