If you're asking me personally, yeah, I know a bunch of them because I play the game a bunch. Mesui and Olek, for two clan leaders.
Speaking more generally, people are going to know at least some of S-tier women to marry and the starting head of their clans, at least if they play for awhile.
edit: This is a bit of an aside though and more of a personal complaint about the entire way M&B (Warband, VC, every mod I played) treats companions. These wooden as **** mannequins that basically exist to pad out my party and act as another XP bar to fill, rather than actual characters. Battle Brothers has wholly generated characters with like two or three sentence backgrounds and I cared infinitely more about Bros (who could and did die at the drop of a hat) than I ever did any companion in any M&B title or mod because they actually did interesting things and expressed plausible motivations through their actions -- the thief couldn't stop stealing **** and so I had to make a choice. The Orc Slayer left when there were no more orcs to slay. The noble bastard (or exiled noble, I can't remember now) had assassins come to try and kill him. It is all proc-gen, background-based reusable because they died constantly but it was way more interesting than having some dude hover in my orbit and maybe one time talk about how he got wounded and ****ed some girl herding cows.