| Full name | William John Hewitt | ||||||||||||||||
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| Date of birth | 6 June 1928 | ||||||||||||||||
| Place of birth | Belfast, County Antrim, Ireland | ||||||||||||||||
| Date of death | 15 May 2019 (aged 90) | ||||||||||||||||
| Place of death | Belfast, County Antrim, Ireland | ||||||||||||||||
| Notable relative(s) | Stanley Hewitt (brother) | ||||||||||||||||
| Rugby union career | |||||||||||||||||
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William John Hewitt (6 June 1928 — 15 May 2019) was an Irish international rugby union player.