芝: The term "fragrant herb" serves as a metaphor for noble character, often signifying precious and virtuous qualities in one's name. It suggests an outstanding demeanor, which is conducive to fostering good relationships and expanding one's social network.

桦: The tree species, birch. "Birch" symbolizes the toughness akin to a tree, unyielding to wind and rain, metaphorically representing a robust physique conducive to good health.