I will give you a simple solution using R which requires the wordcloud package. Of course there are many other solutions which do not require any programming skills.
The solution is a slight varient of this R-Bloggers tutorial. Feel free to have a look there for further formatting.
library(wordcloud)
words = c('Paolo Gentiloni', 'Matteo Renzi',
'Enrico Letta', 'Mario Monti',
'Silvio Berlusconi', 'Romano Prodi')
freq = c(100, 25, 50, 70, 95, 20)
wordcloud(words = words, freq = freq, min.freq = 1,
max.words=200, random.order=FALSE, rot.per=0.35,
colors=brewer.pal(8, "Dark2"))
It produces the following output:
Btw. @Lorenzo Perone: Where the ones listed Italien names? I was not sure about that.