杜: Du Kang, Du Fu. The character "Du" refers to the sweet pear tree, as stated in the "Shuowen Jiezi" dictionary: "The male is called 'Tang', and the female is called 'Du'."
丹: Danhong, Dantong. In names, it often signifies prosperity and flourishing, symbolizing a vibrant and thriving success.
Meaning: The name Du Dan has a melodious rhythm and elegant form, symbolizing nobility and grace like the peony.