John Tirel, or Tyrell (died 1395) was a prominent judge and statesman in fourteenth-century Ireland who held office as Serjeant-at-law and Chief Justice of the Irish Common Pleas. Cotterell acted in Tirel's place for several sessions, over a period of nine months. In 1389 Tirel was personally ordered to hold the assizes in Carlow. In 1392 he was described in the Patent Rolls as "Chief Justice of the Common Bench of the King of Carlow", suggesting that he had moved there permanently. ;ref ;"Patent Roll 16 Richard II" ;/ref ; He died in 1395.
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