Mr Erlanger, 38, of Powis Gardens, Golders Green, faces one charge of harassment in relation to incidents alleged to have taken place between December 25 last year and January 23 this year.
He has been bailed to appear at Hendon Magistrates' Court on May 2.
Mr Feldman, 29, of Lynmouth Road, Stamford Hill, faces three charges of harassment without violence. He will appear at the same court on May 15.
The men were charged today at Colindale police station.