Where does “all-englobing” come from?

all-englobing (English) comes from English all-, from Middle English all-, from Old English eall-, from Proto-Germanic ala- — compound form of *allaz.

Ancestry of “all-englobing”, step by step

Step	Language	Word	Meaning
1	English	all-	Indicates complete power or authority in an area;...
2	Middle English	all-	—
3	Old English	eall-	all, every; pan-; completely, totally; very
4	Proto-Germanic	ala-	compound form of *allaz

Every word from Proto-Germanic ala- →Every word from English all- →Every word from Old English eall- →