Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Old English on-
← Old English an- (alter)
← Old English and- (mention)
← Proto-Germanic *ana (inherited)

→ English an- (mention)
→ English en- (cognate)
→ English on- (inherited)
→ English thereabout (mention)
→ Old English un- (mention)
→ Old English un- (alter)
→ Old English onginnan (affix)
→ Old English onbutan (affix)
→ Old English onsendan (affix)
→ Old English onsittan (affix)
→ Old English onwacan (affix)
→ Old English ansien (affix)
→ Old English onþracian (compound)
→ Old English anhealdan (mention)
→ Old English onscogan (mention)
→ Old English onhierdan (affix)
→ Old English onweorpan (affix)
→ Old English onfæreld (affix)
→ Old English oneardian (affix)
→ Old English oneardiend (affix)
→ Old English onerian (affix)
→ Old English onsteall (affix)
→ Old English onhyrian (affix)
→ Old French en- (cognate)