In Norse mythology, Thor (from Old Norse Þórr) is a hammer-wielding god associated with thunder, lightning, storms, oak trees, strength, the protection of mankind, and also hallowing, healing, and fertility. The cognate deity in wider Germanic mythology and paganism was known in Old English as Þunor and in Old High German as Donar (runic þonar ᚦᛟᚾᚨᚱ), stemming from a Common Germanic *Þunraz (meaning "thunder").

Ultimately stemming from Proto-Indo-European religion, Thor is a prominently mentioned god throughout the recorded history of the Germanic peoples, from the Roman occupation of regions of Germania, to the tribal expansions of the Migration Period, to his high popularity during the Viking Age, when, in the face of the process of the Christianization of Scandinavia, emblems of his hammer, Mjölnir, were worn in defiance and Norse pagan personal names containing the name of the god bear witness to his popularity. Into the modern period, Thor continued to be acknowledged in rural folklore throughout Germanic regions. Thor is frequently referred to in place names, the day of the week Thursday ("Thor's day") bears his name, and names stemming from the pagan period containing his own continue to be used today.

Michael ( /ˈmaɪkəl/) is a given name that comes from the Hebrew: מִיכָאֵל / מיכאל‎ (Mikha'el), derived from the Hebrew question מי כמו אלוהים? (Hebrew pronunciation: [mi kəmo ʔelohim]) meaning "Who is like God?" In English, it is sometimes shortened to Mike, Mikey, or, especially in Ireland, Mick. In Russian language, it is Mikhail and Mykhailo in Ukrainian.

Female forms of Michael include Michèle, Michelle, Michaela, Mechelle, Micheline, and Michaelle, although Michael is occasionally seen as a female name, with women named Michael including actresses Michael Learned and Michael Michele. Another form is Mychal, which can either be a male or female name. Surnames that come from Michael include Carmichael, Dimichele, MacMichael, McMichael, Micallef, Michaelson, Mikhaylov, Mykhaylenko, Michaels and Mitchell.

The name first appears in the Bible, Numbers 13:13, where Sethur the son of Michael is one of twelve spies sent into the Land of Canaan. The Archangel Michael, referred to later in the Bible (Daniel 12:1), is considered a saint by the Roman Catholic Church and Eastern Orthodox Church. 29 September is the feast day of the three archangels, Michael, Gabriel and Raphael.