Both Ji and Ji are surnames (pronounced jī), but "ji" has another pronunciation (qǐ) and several interpretations.
Ji (jī), 1. check, 2. care, 3.lt; book gt; stay, delay.
Ji (qǐ), Jishou: a kind of etiquette in ancient times. Kneel down, put your hands to the ground, and put your head to the ground.