Welcome to the forum, Matt!
Not a royal heirloom piece but certainly looks like a genuine, antique keris from the Bugis-influenced sphere.
It will look better if you obtain a fitting pendokok/selut for it: a cup-shaped bronze/brass piece would suit the ensemble IMHO.
The hilt shows some wear and may be a village version. I've seen hilts of similar shape being referred to the Riau/straits region but I may overlook details hinting at another origin.
All in all a nice piece of history and certainly a very decent start for a keris collection!
Regards,
Kai