>>64382022
Adding to what the other anons said, black can also mean evil or unholy (a gathering of witches is called a black sabbath, devil-worshippers hold black masses, curses are black magic). A "black wake" isn't a traditional term, but when it's used in the same sentence as "vampire", it's natural to assume it means a funeral for the undead.

https://en.wikipedia.org/wiki/Wake_(ceremony)