Gudjon Thordarson, who led Stoke City to promotion from the third tier in 2002 and managed three other English clubs, has died aged 71.
He had been living with Parkinson's in recent years.
Thordarson had managed his native Iceland before becoming Stoke boss in 1999 and was in charge for their EFL Trophy success in 2000.
After consecutive play-off semi-final defeats in Thordarson's first two seasons, the Potters went up through the play-offs in 2002 - although Thordarson departed the club a few days later.
He also had spells in charge of Barnsley (2003-04), Notts County (2005-06) and Crewe Alexandra (2008-09).
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