#cercopithecidae

Dusky Leaf Monkey aka Spectacled Langur (Trachypithecus obscurus), family Cercopithecidae, Malaysia

A dusky leaf monkey (Trachypithecus obscurus) and its infant in Malaysia. Infants of this species are born orange/blonde, which fades as they age

Shan Langur Trachypithecus melamerus

Found in southwestern China and eastern Myanmar. They are listed as endangered.

Someone who identified themself only as Pendrew asked for a "ruminant-like Old World Monkey":

After much of East Africa rifted off into a separate continent, shifting climate turned the alpine grasslands of what was once the Ethiopian Highlands into into warmer subtropical forests – and the highly terrestrial grass-eating geladas that inhabited the region adapted to new sources of food.

Yedenigelada pendrewsii is a large quadrupedal herbivorous monkey, about 1.5m tall at the shoulder (~5'). It has a specialized pseudoruminant digestive system with a three-chambered stomach, similar to that of camelids, and it occupies an ecological niche convergent with the ancient chalicotheres, selectively browsing on trees and shrubs while sitting upright and using its long clawed forelimbs to pull branches within reach. 

Unlike its highly social ancestors this species is mostly solitary, although during the breeding season groups of males come together in leks to compete for female attention. Displays consist of inflating large colorful throat pouches to make loud resonating calls, and flipping upper lips to bare teeth and gums.

Bonnet Macaque (Macaca radiata), family Cercopithecidae, order Primates, Kerala, India

Macaques are large, intelligent, omnivorous monkeys spread throughout Asia, with a single species in Northern Africa and Europe

They live in large groups with complex hierarchies

Several species, including the Bonnet macaque, have adapted well to living among people, becoming a nuisance as they raid crops, eat garbage, and occasionally attack people

Bonnet macaques are named for their “hairstyle”

become ungovernable