Correcting several wrong names in a data.frame in R (approach recommendation)

I have a file with around 260 customers, but because the name of the same customer is spelled in many different ways, as in the following example:

Cesar Fereira
Cesar Féreira   
César Fereira   
Cezar Fereira

because of this I have about 1000 different names, so I would like a recommendation approach on how to proceed with name correction in chain, for all customers using R package or a kind of approach.