1) English boy name 2) English toponymic surname 3) Fictional elephant 4) He heard a Who 5) Seuss character 6) Seuss pachyderm 7) Who hearer 
[given name] Horton is a masculine given name. People or fictional characters named Horton include: ...
Type: Term Pronunciation: hōr′tŏn Definitions: 1. Bayard T., U.S. physician, 1895-1980. See: Horton arteritis, Horton cephalalgia, Horton headache