Why is Yehoshua’s name Bin Nun rather than Ben Nun? Why does his appear in end of האזינו as הושע? The Rebbe

Why is Yehoshua’s name Bin Nun rather than Ben Nun? Why does his appear in end of האזינו as הושע? The Rebbe

Why is Yehoshua’s name Bin Nun rather than Ben Nun? Why does his appear in end of האזינו as הושע?
Rabbi Eli Silberstein