One guy didn't like dLedger because he associates Ledger with the wallet of that name.

I have one, but that didn't put me off dLedger. It would seem a shame to dump a good name just for this reason.

I am also proposing dMesh and dGraph as alternatives

Not really grabbed by dGraph - as in my understanding at least - it doesn't appear to lucidly reflect the qualities you were aiming for? However, dMesh seems a better match; I quite like it, and as you point out, easy to say and spell.

I can't recall now what made you go cool on the "mesh" names previously.