[from link]
Others, however, say that Hebrew names often incorporate the name of God in them, and Isaiah often gives long, multi-syllable names to children to be born. For instance, Isaiah's sons were named She'ar yashuv (which means "a remnant will return") and Mahar shalal hash baz (which means "quick to the plunder, swift to the spoil"). However, all such names form a small understandable phrase and not a list of acclimates like the list in Isaiah 9:6. The list is constructed of 4 pair of 2 word phrases with the first word of each pair being a titles and the following word being a word describing what he has title over. Wonderful of counseling, God of might, Father of eternity, Prince of peace. So it would seem that these titles are giving the attributes of God to Messiah.
As far as I am concerned, Christians are free to interpret the scriptures any way they want to. What bothers me is when they use their, IMO, faulty interpretations to try to prosyletize Jews.