The name could either be a Finnish and Estonian form of Timothy or it could be an Old German short form of Dietmar.
In Greek, it is used as a feminine form of Timothy.
Currently, Timo is the 40th most popular male name in German-speaking, Switzerland, (2010). His rankings in other countries are as follows:
- # 60 (Netherlands, 2010)
- # 70 (Germany, 2011)