[@ArisenMoon]

Shit, I've made a lot of references to the Lord of Goldengrove, I don't ever think I named him but I shall search that up in my posts now in case I have, in which case I can retcon anything for yours- he looks pretty sick :D 

Though yes as Didact says, the Tarlys weren't wiped out- Dickon fights alongside Garlan Tyrell, believe it or not. The Rowans still rule Goldengrove and a great amount of the north-west of the Reach, and contribute a sizeable force in the campaigns being fought in the Red Mountains, likely riding the wave that the Reach has in terms of it's agriculture and soft power in the Seven Kingdoms. Chances are, he's got a slot on Merlin's advisory position- so you could place him a great number of places. 

That's an awesome character- if you're in the lands of the Reach have a lookey at House Tyrell as it stands and House Florent too. :) 

EDIT:

Okay, there was https://www.roleplayerguild.com/topics/158165-game-of-thrones-the-pact-of-ice-and-fire-always-open/ooc?page=39#post-4199947

which was an old CS but irrelevant and I believe the Goldengrove armies are predominantly in the Stepstones, though I imagine a good number ended up in the Red Mountains. 

Also, Alys Rowan (Goldengrove I called her for ages, bleh my fuck up) was married to Willas and had four kids, one named after her by him- she died two years ago. Not sure what that may have as an impact, but they were close.