This character means a precious jade and is often used in given names.
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玮 is literary and rarely stands alone; its 'fine jade / precious' sense survives mainly as an auspicious given-name character and in the compound 玮宝 (rare treasure). Not used in everyday speech.
The left side looks like 王 but is the jade radical 玉 in its squeezed left-hand form. It marks 玮 as a jade word, the same radical as 珍 treasure and 珠 pearl.