Glennavon \g-lenna-von, gl(en)-navon\ as a boy's name is a variant of Glenavon (Old English), and the meaning of Glennavon is "valley near the Avon".

The baby name Glennavon sounds like Glennavin and Glenavin. Other similar baby names are Glennon, Cleavon, Glendon and Glenton.