Julius passed away in 1993 in this world
In real life, Chris Rock lost his father in 1988 after an ulcer surgery. And one or two episodes in the show have the adult narrator Chris mention that his father is no longer alive. Now, there's a five year time difference between the show and real life (Real life Chris turned 13 in 1978, but in the show that happens in 1983)note . With this in mind, it is definitely possible that the show Julius died in 1993, five years after the real Julius passed away. However this is contradicted by imagine spots that portrays show Julius as a senile old man.
The Mr. Omar who appears in "Everybody Hates Funerals is not the same who appears in the rest of the series.
They just have the same last name.He passed away, then the brother took his place. Tragic.