Konon 10 was the son of a "Thracesian" ("oriundus patre Thraceseo") (Anonymus 237): Lib. Pont. 85. 1. This probably means that his father was a soldier serving among the Thrakesioi. Konon 10 was brought up in Sicily; he then went to Rome, where he entered the service of the church and rose to become priest: Lib. Pont. 85. 1 ("edocatus apud Siciliam, postmodum Romam veniens eiusdem ecclesiae militans ad presbyterii honorem devenit"). He became bishop of Rome in succession to pope John V (Ioannes 31) and occupied the see for eleven months: Lib. Pont. 85. 1. He was bishop of Rome from 21 October 686 to 21 September 687. The election was disputed, the clergy favouring Petros 65 and the army Theodoros 167; eventually the clergy chose Konon 10 as a compromise candidate and the army, after a short delay, accepted him; his election was then reported to the exarch Theodoros 165 in Ravenna: Lib. Pont. 85. 1-2. He created a problem by appointing the deacon Constantine (Konstantinos 135) as rector of the patrimonium in Sicily, without the consent of the clergy and on bad advice: Lib. Pont. 85. 4.

Konon 10 died after a long illness, which greatly weakened him, and was buried in St Peter's on 21 September; on his deathbed he distributed gold among all the clergy, the monasteries of the diaconia and the mansionarii: Lib. Pont. 85. 5. His death was followed by another disputed papal election: Lib. Pont. 86. 2.

Konon 10 is described as an old man, with grey hairs, of angelic appearance, truthful, simple and peaceful, who had devoted his whole life to religion and never concerned himself with secular affairs: Lib. Pont. 85. 2 ("aspectus angelicus, veneranda canicies, sermo verus, provecta aetas, simplex animus, quieti mores; religiosae vitae, qui se numquam aliquando in causis actusque saeculares commiserat").

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