The WCSB and the FMs cover different time periods, so that wouldn't yield the result you seek. Plus the FMs really only show Khans/Galaxy Commanders/Cluster Commanders, a fraction of the warriors in each Clan. Not listed would be things like, Clan warriors serving on warships, or in non-combat posts such as military governors, or as advisers, or sibko trainers even. Plus WCSB didn't cover all of Clan Wolf did it? I think it only covered those Galaxies that participated in Operation Revival, five galaxies worth. Everyone and everything else was back in Clan space.
Bondsmen are a fact of life in the Clans. You fight, you lose, if you survive, you get taken as bondsman. Considering how much the Clans fight, in Trials big and small, that means it happens a lot. My best guess, at least 1 in 15 Clan Trueborn warriors wear the bondcord at least once in their lives. I'm focusing on Trueborns because Freeborns may be treated a little differently by some Clans that don't accept freeborn warriors. Also to the bondholder, in some Clans, a bondsman is almost like a living trophy, proof of your strength and success, at least until he becomes a warrior again. It goes hand in hand with the "waste nothing" mentality.
Mechs and ASFs have ejection seats, Elemental armor has features that can help keep a warrior alive until Clan medical science can do its thing. All of these factors mean warriors do survive battles, even the ones they lose. So when you read that in some fight the "entire Cluster X of Clan Y was destroyed", they could have taken dozens of bondsmen from that.
Bondsmen help sustain the Clan way of life. With so much fighting, and relatively speaking, so few warriors, you can recoup some of your losses of a successful campaign through obtaining bondsmen. Like salvage. Frankly it always surprised me that we didn't see as much scatter of bloodnamed individuals in the Clan FMs. More or less, you saw the list of that Clan's "exclusive" bloodnames, and those with few exception those were the names that repeatedly popped up as Galaxy/Cluster commanders in every Clan. I always felt like that was too stratified, it didn't reflect how many good warriors of bloodnames of other Clans must be serving there. And of all things, bondsmen turned warriors with the Kerensky bloodname, would in my mind be someone put on a pedestal, in any Clan. If only so you can point at Clan Wolf and do the Simpsons Ralph laugh.
Coming full circle to the point, no, I don't know of any specific Kerensky in the other Clans, but you have to consider all of the above. Plus the sentence that I pulled from WoR and pasted in the first post on this thread. Which would imply such warriors do exist.