(1) Quintus Caecilius Metellus Macedonicus was the second son of Roman politician and general Lucius Caecilius Metellus Diadematus .
(2) Quintessus Caecilius Metellus Macedonicus was the second son of Roman politician and General Lucius Caecilius Metellus Diadematus .

Do these two sentences mean the same thing?
yes