'advocation' originates from Latin, specifically the word 'advocatio', where 'ad-' meant 'to' and 'vocare' meant 'to call'.

'advocatio' transformed into the Old French word 'avocacion', and eventually became the modern English word 'advocation'.

Initially, it meant 'a call to someone for help or support', but over time it evolved into its current meaning of 'the act of advocating or pleading for something'.