Literature Reference: Yu, also means 'surplus'. From 'Shuowen Jiezi'.
馀: "Meet 'Yu.' Endowed with innate intelligence, destined for fame and fortune, achieving great success in midlife, and enjoying a blissful old age. In the name, the bearer is blessed with robust health, a magnanimous demeanor, and profound erudition."
Meaning: Surplus implies abundance and a worry-free life.