Literature Reference: 叔，伯仲叔季；阳，日也。——《说文解字》 'Shu' refers to the third among brothers, and 'Yang' signifies the sun. Source from 'Shuo Wen Jie Zi'.
叔: Father's younger brother.
阳: Sunlight. It symbolizes warmth and radiance.
Meaning: Shu Yang signifies the third son in a family, embodying light and warmth.