Saint Augustine of Canterbury is credited with converting King Ethelbert.
St Augustine
Augustine
Aethelbert, King of Kent, was the first English King to convert to Christianity. In 597, the Roman Catholic Church approached Aethelbert. The church chose him because he was married to Bertha, a Frankish Christian princess, whose support was essential.
Aethelbert was King of Wessex from 860-865.
King Ezana converted the Axumite Empire into Christianity.
King Ezana
First king of the Franks. He converted to Christianity.
Christianity
First king of the Franks. He converted to Christianity.
King Ezana of Axum converted to Christianity.
Olaf I of Norway.
King Clovis did not convert to Islam. Instead, he converted to Christianity, which was the religion of the people of Gaul.
The first is said to have been Constantine who, although made Chrisitianity acceptable within the Empire in circa 314 AD, it is believed he continued in his worshipping of the sun until his death bed when he converted to Christianity. See related link below:
In the fourth century King Ezana, converted to Christianity and was baptised as Abreha,