From the same as ya'an; the ostrich (probably from its answering cry -- ostrich.
see HEBREW ya'an
H3283. yaen
[יָעֵן] noun [masculine] ostrich (i.e. voracious one ?); — only plural absolute ׳כ בַּמִּדְבָּר ענים Lamentations 4:3 Kt; Qr כַּיְעֵנִים.