Aijala should be spelled Äijälä. In modern Finnish, äijä has obtained the meaning of "the man." Like, "you're the man" could be translated to spoken Finnish as "vähän oot äijä." (which is word-by-word: not-too-much you're the-man). Young men, especially those of lower education, but also through-out the society, can use this for promoting each other and to create a group feeling. The word äijä in this modern meaning is slightly anti-feministic, since gals cannot usually gain äijä-status - not that one would that often want it, anyway ;-)
As far as I know, I am not directly related to Äijälä, even though my name has many of the same letters, and in the area where my paternal line is from (Alatornio, Finland) there are some Äijäläs, some of which have married some relatives of mine.