The 18-year-old was born in Cameroon but has dual nationality with France and has been capped at U19 level.
A 6ft 3in centre back, Onguene has broken into Sochaux's first team and can also play at right-back.
He has impressed scouts with his strength and unruffled style and first came to prominence playing for the Sochaux U19 side which lifted France's youth cup, the Coupe Gambardella.
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