思: Thought, intellect. In names, it often signifies quick thinking, sharp wit, and intelligence.
玫: The two-syllable word "玫瑰 (méi guī)" refers to a type of beautiful jade, symbolizing auspiciousness. When used in names, it often signifies a person's clarity and purity.
Meaning: Si represents thought and longing, symbolizing wisdom and deep emotion; Mei refers to roses, symbolizing beauty and nobility.