There are at least six artists with this name:

1) Ancestors is the experimental black metal/ punk project of Mark McCoy.
2) Ancestors is a five piece heavy progressive ensemble hailing from Los Angeles.
3) A Canadian outfit from Toronto, Ontario
4) Ancestors is R.A.C. band from Slovakia
5) Ancestors was a R.A.C. band from Sweden.
6) Jordan Castro, Courtney Plumley along with instruments, in Ohio.
7) Ancestors is a hardcore band from Waterloo, Iowa.