'alf' originates from Old English, specifically the name 'Ælfrēd', where 'ælf' meant 'elf' and 'ræd' meant 'counsel'.

'Ælfrēd' transformed into the modern English name 'Alfred', and 'Alf' became a common diminutive form.

Initially, it meant 'elf counsel', but over time it evolved into a common given name and its diminutive form 'Alf'.