Tàiláng shì jiālǐ de zhǎngzǐ, xiàmian hái yǒu yí ge dìdi jiào Cìláng.
Taro is the eldest son, and he has a younger brother called Jiro.
Tips
culture
太 "great, eldest" plus 郎 "young man". In Japan the name, read Tarō, traditionally went to the first son and 次郎 (Jirō) to the second; it also ends longer names such as Kentarō. Chinese reads all these names in Mandarin.