Hayate Namikaze is a renown shinobi of the Leaf village known particularly for his campaign against Amegakure He is also the brother of Minato Namikaze.
As for all the members, we only know of Minato. No other Namikaze member was revealed in the manga. I haven't watched all the fillers, but.
A female member of the clan (Minato and Hayate's cousin) Kaguya as she has never been seen or traced since, but there is a slight chance she is still alive.
Minato Namikaze (波風ミナト, Namikaze Minato) was the Fourth Hokage (四代目 火影, Yondaime Hokage, Literally meaning: Fourth Fire Shadow) of.
During part of their chūnin exams, his team confronted Team Minato. After Hayate's death, Genma proctored the final round matches of the Chūnin Exams.
Naruto - Kakashi Hayate x Obito Uchiha + Team 7 & Rin Nohara & Minato Imagine if they were still alive how much happier Naruto would've been at that age.