In several secondary sources he is called "Williams Thomson" or "Williams Thompson", but in his own work published on "Atti dell'Accademia Delle Scienze di Siena" and on the article of Paneth he is indicated as "G. Thomson".
In several secondary sources he is called "William Thomson" or "William Thompson", and sometimes is even confused with Lord Kelvin (1824-1907). However in his own work published on "Atti dell'Accademia Delle Scienze di Siena" and on the article of Paneth he is indicated as "G. Thomson".