Four spellings, one angel, and a planetary office that keeps being handed to somebody else.
The name is usually read as he who sees God, and it travels as Khamael, Camael, Kamael, Camiel and Chamuel depending on the language it passed through and the century. Geburah, where the sephirotic table places him, is severity, the fifth sephirah, the restraining judgement that holds back the unmeasured mercy of Chesed, and its planet is Mars.
Here the two systems agree, which is rare enough in this collection to be worth pointing out. Agrippa's table of the planetary angels gives Mars to Camael. The Golden Dawn's sephirotic table gives Geburah to Khamael, and Geburah is Mars. The Mars attribution therefore survives the crossing between traditions intact, and Samael, whom modern popular sources routinely give as the angel of Mars, does not appear in Agrippa's seven at all.
The persistent confusion with Samael has an obvious cause. Both names are attached to Mars in one source or another, both are short, both sound similar in Latin transcription, and both are associated with severity. Their roots are different and their characters are different.
The most recent layer is the softest. The Chamuel of contemporary angel literature is the same name again, recast as an angel of love and of finding lost things. That is a long way from Geburah, whose whole function in the diagram is to cut. Naming the drift is the only way to keep both readings usable.