The name Heffernan is derived from the Irish Gaelic name O Heifearnain, which comes from the given name Ifearnan meaning "demon". Heffernan gives rise to alternatives such as Heffernon and Hefferan.
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。