Dementia (from L.demens), commonly referred to as insanity or madness, is usually associated with a progressive loss or weakening of self control, thought and/or reason. In its more serious forms, dementia is often mistakenly referred to as mental imbecility or even idiocy.
... McLaren[?], (New Zealand)
1963 - Graham Hill, (United Kingdom)
1964 - Graham Hill, (United Kingdom)
1965 - Graham Hill, (United Kingdom)
1966 - Jackie Stewart[?], ...