more than ...; exceeding ...
Suffix attached to a number to mean 'more than that number' or 'exceeding that number', used specifically for people. Common in formal or written contexts.
The number of participants reached more than 100.
More than 50 people were injured in the accident.
Compound of 余 (yo, 'surplus, more than') and 名 (mei, 'counter for people'). The reading よめい is a standard on'yomi combination.