此男有妻请勿勾引此女有夫请勿靠近
[cĭ nán yŏu qī qĭng wù gōu yĭn cĭ nǚ yŏu fū qĭng wù kào jìn]
This translates to 'This man is married, please do not try to seduce him; this woman has a husband, please do not get too close'. It's typically used to express a sense of territoriality or protection within a relationship, emphasizing the boundaries of marriage. People using such names are usually protective of their relationships.