坦:
Level and open, often used in names to signify a person's integrity and magnanimity.
兰: The orchid, one of the Four Gentlemen among flowers, often symbolizes individuals of noble and virtuous character in names, which is beneficial for garnering affection and respect from others.
Meaning: The name 'Tan Lan' has a melodious tone, with 'Tan' implying openness and honesty, and 'Lan' symbolizing elegance and purity.