Subramanya is another version of Skanda.
The six heads represent the six rays or attributes, namely, wisdom, dispassion, strength, fame, wealth and divine powers. They indicate that He is the source of the four Vedas, the Vedangas and the six schools of philosophy. They also indicate His control over the five organs of knowledge as well as the mind. They denote that He is the Supreme Being with thousands of heads and hands. His head turned in all directions signifies that He is all-pervading. It indicates that He can multiply and assume forms at will.