FROM AFRICA TO MIDDLE EAST TO NORTHERN EUROPE
Haplogroup I1 (I-Z2699) is the most common type of haplogroup I in northern Europe. It is found mostly in Scandinavia and Finland, where it typically represent over 35% of the Y chromosomes. Associated with the Norse ethnicity, I1 is found in all places invaded by ancient Germanic tribes and the Vikings. After the core of ancient Germanic civilisation in Scandinavia, the highest frequencies of I1 are observed in other Germanic-speaking regions, such as Germany, Austria, the Low Countries, England and the Scottish Lowlands, which all have between 10% and 20% of I1 lineages.
[Text source: https://www.eupedia.com/]
Note the root has changed at FTDNA for I1 from I-M253 to I-Z2699 in November 2020.