The phrase "are much given" is correct and usable in written English.
It can be used to indicate that someone has a strong tendency or inclination towards something.
Example: "They are much given to daydreaming during meetings, which can be distracting."
Alternatives: "are very inclined" or "have a strong tendency".
There is also the message that fabulous, celebrated people are much given to friendship and the exhange of sincere human feelings on a one-to-one basis.
Shrivaishnava Brahmans are much given to scholarly pursuits and have earned for themselves the honorary title of acharya, or, in Tamil, ayyangar, often spelled iyengar.
It is the fourth stage in Talk Talk's intriguing metamorphosis from the quirky singles band who appeared at a time when Duran Duran were considered the ultimate role model, to a collective of almost painfully intense musicians who are much given to name-checking Satie, Bartók ("a great geezer") and Debussy.
The characters in "Rappaccini's Daughter" are much given to exclaiming "Perchance" or "Methinks", but the stagey vocalising, far from reducing the milieu into a poor pseudo-Scottian pastiche, actually gives them a strange floating temporality, halfway between myth and social reality.
Disarmingly jaunty, as a lecturer he is much given to self-deflation, teasing and word-play.
She is much given to mannerisms, twisting her hair round her finger, hugging herself.
But he is much given to making threats, bearing grudges and behaving with malice aforethought.
Lead singer Bian Yuan is much given to being interviewed in lavatories, drinking until he pukes, and talking about causing chaos.
He is much given to energetic tics like slapping his forehead with the palm of his hand.
He is much given to using words like "insular, self-made and self-justified" to describe the farm.
Neither of the Georges is much given to candour, H.W. because of his WASP-y reserve and W. because he's not a pontificator.
