reputed

re|put|ed /rɪpj'uːtɪd/
[V-PASSIVE] be V-ed to-inf
If you say that something is reputed to be true, you mean that people say it is true, but you do not know if it is definitely true. (FORMAL)
The monster, which is reputed to live in the deep dark water of a Scottish loch...
reputedly [ADV] ADV with cl/group, ADV before v
He reputedly earns two million pounds a year...