嘉（jia）
Name meaning
嘉 (jia) means excellent, admirable, auspicious and worthy of praise. It is more formal and ceremonial than 佳 (Jia), and in a name it should feel honorable rather than merely lucky.
Practical naming use
Use 嘉 (jia) when the name should feel praised, auspicious, socially graceful and trustworthy. It suits scholarship, public service, hospitality, leadership or a warm cultivated style.
Pair 嘉 (jia) with a defining value: 嘉文 (Jiawen), 嘉明 (Jiaming), 嘉诚 (Jiacheng) or 嘉宁 (Jianing). The second character should add substance, not just more good luck.
嘉文 (Jiawen): Jia contributes excellent, auspicious; Wen adds culture, writing.
Reference
Shijing, Luming
Historical / name-use references
郭嘉 (Guo Jia)
Guo Jia (170-207) was a strategist serving Cao Cao. Sanguozhi, juan 14, opens his biography with 郭嘉字奉孝 (guo jia zi feng xiao), giving direct premodern personal-name evidence for 嘉 (Jia).