How does infeudation works in stark lands? Glover and thallarth and cerwyn have lands but the cassels . Are the clans directly loyal to winterfell or they are like the umber, boltons etcccc

Good question!

The Glovers and Tallharts are “masterly” Houses, which makes them equivalent to landed knights – as principal Houses, they hold a lot of land (Deepwood Motte/the Wolfswood and Torrhen’s Square respectively) directly from House Stark, but they don’t have the right of pit and gallows. Instead, on Glover or Tallhart land, justice comes from the Starks themselves (which fits with Northern custom and tradition).

The Cassels and the Pooles are minor, unlanded nobility (i.e, sworn swords or the equivalent of household knights) in customary service to the Starks of Winterfell: the Cassels serve in various military capacities as master-at-arms, captain of the guard, castellan, etc. whereas the Pooles serve as stewards of Winterfell.

The Cerwyns are regular bannermen of the Starks: they have their own land near Winterfell, they have their own castle, they have the title of lords, indeed they even have vassals in the form of House Condon. So technically the Cerwyns have a higher status than the Glovers or Tallharts, even though the Glovers and Tallharts have much more land than they do.

The hill clans are direct vassals of Winterfell, and given the unusual terms of their feudal contract with Winterfell, I’ve argued that they were probably among the first vassals of House Stark. Notably, unlike the Umbers or Boltons (and most of the other Northern houses), there are no records of the hill clans being subjugated in war by the Kings in Winter.