Walid’s brother Bilel Saadaoui, 35, pleaded not guilty to failing to disclose information about acts of terrorism during the hearing at the Old Bailey.
A trial has been set to take place at Preston Crown Court from October 7 next year.
Walid Saadaoui, of Crankwood Road, Abram; Bilel Saadaoui, of Fairclough Street, Hindley; and Hussein, of no fixed abode, spoke to confirm their identities during the hearing.
Mrs Justice Cheema-Grubb set a further preparatory hearing at the Old Bailey on March 14.