Fewer neutrons are produced from 11B(11B, n) than from 11B(p, n)11C for temperatures from 100 to 800 keV. For temperatures below 300 keV, 11B(d, n)12C produces more neutrons than either of these reactions if the normal isotopic mixture of hydrogen is used. Potentials generated by the double-folding method and tested against 7Li + 7Li data were used to generate 11B + 11B cross sections for energies where there were no measurements.