Where does “self-realisation” come from?

self-realisation (English) comes from English realisation, from French réalisation, from French réaliser, from Latin reālis, from Latin rēs, from Latin vindicatio, from Latin vindicō, from Latin vindex — small stone, pebble; gravel, rubble.

Ancestry of “self-realisation”, step by step

Step	Language	Word	Meaning
1	English	realisation	—
2	French	réalisation	making; creation; realization; direction
3	French	réaliser	to direct; to fulfill; to perform
4	Latin	reālis	real
5	Latin	rēs	thing, object, stuff
6	Latin	vindicatio	civil lawsuit; protection, defence; vindication;...
7	Latin	vindicō	to lay claim to as one's own (often with sibi)
8	Latin	vindex	claimant, vindicator
9	Latin	dīcō	to say, talk, speak, utter, mention
10	Latin	-tiō	tion, -ation, -ing
11	Latin	dissertātiō	(spoken) dissertation, discourse, disquisition
12	Latin	dissertus	arranged, disposed; explained
13	Latin	disserere	second-person singular future passive indicative...
14	Latin	dis-	asunder, apart, in two; reversal, removal;...
15	Latin	calceus	shoe
16	Latin	calx	limestone; chalk; the finish line
17	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

Every word from Ancient Greek χάλιξ →Every word from Latin -tiō →Every word from Latin dis- →