This　paper　investigates　a　nonlinear　internal　model　approach　for　the　leader-following　rendezvous　problem　for　a　class　of　single-integrator　multi-agent　systems　subject　to　an　uncertain　leader.　The　problem　is　first　converted　into　an　auxiliary　cooperative　stabilization　with　connectivity　preservation　problem.　The　latter　problem　is　then　solved　by　a　potential　function　based　high-gain　feedback　control.　The　theoretical　result　is　also　illustrated　by　a　simulation　example.　©　2017　IEEE.