Literature Reference: I have heard of Ji Kang and Lü An, who deeply regretted their carefree and unruly nature. Source from 'Wan Gui Xiang Shan Si Yin Yong Suo Huai'.
疎: "Shu", synonymous with "sparse".
顽: Tenacious and resolute, when used in a person's name, it symbolizes unwavering determination and steadfastness.
Meaning: Shū wán signifies a carefree and unconstrained nature, describing someone who is free-spirited and unbound by worldly rules.