'population-related' is a compound word formed from 'population' and 'related'. 'Population' originates from Latin 'populatio', meaning 'people', and 'related' comes from Latin 'relatus', meaning 'brought back'.

'Population' evolved from the Latin 'populatio' through Old French 'populacion', while 'related' evolved from Latin 'relatus' through Old French 'relater'.

Initially, 'population' referred to 'a group of people', and 'related' meant 'connected'. Together, they now refer to matters concerning the population.