Cunha was the no.10 at Wolves last season, when he scored 15 goals in 33 games after succeeding Daniel Podence.
He previously wore 12 for the Black Country club and donned no.9 and no.19 while at Atletico Madrid.
Matheus was no.10 for Hertha Berlin during the 2020/21 season but had a variety of different shirt numbers at his other clubs Sion and RB Leipzig.
The number is a famous one in his native Brazil, having been synonymous with several of the country's biggest stars.