I like to use first names (=forename) to cite the work of others. It has become even more relevent when I found that somebody working in my field shares my initial and surname.

However, this is not the most common practice and I many times, I do not know the forenames of the people I would like to cite.

Do you know of any pratical way to find these information ?

I usually resort to some Google and Google Scholar search but that does not always solve the issue and can be time consuming (considering it is a detail).