We'll search for every combination of “River” and your other names.
R*VVR
RV*VER
RR*EER
R*ERR
RR*ERR
RV*ERR
R111VR*
R*VRR
RR*VRR
RR*VVR
RR*VER
R*EER
RV*EER
RV*RRR