仲 marks a second son: Confucius had an older half-brother. 尼 comes from 尼丘, the hill where his parents prayed for a son, which also gave him his personal name 丘 'hill'.
culture
A line quoted by 朱熹 sums up his standing: 天不生仲尼,万古如长夜 'had Heaven not produced Zhongni, all the ages would be one long night'.