Meaning and name origin
Dallen \d(al)-len\ as a boy's name is of Irish and Old English origin, and the meaning of Dallen is "blind; from the valley". Dallen is a variant of Dallan (Irish): saint Dallan of Ireland (sixth century) was a poet known for his great learning. Also a variant of Dallin (Old English): place name.
Dallen is not a popular first name for males but a somewhat popular surname or last name for all people (#86298 out of 88799, Top 97%) (Source: 2000 U.S. Population Census).
Displayed below is a comparison of the popularity of the boy name Dallen and its variant forms. The only popular variation form ranked in the Top 1000/100 is Dallin. (Source: 2014 Birth Name Statistics).
Dallen is also pronounced similarly to Daelan, Dalen, Dalwyn, Dalyn, Daylan, Daylen, Daylin, Daylon, Dillan▼, Dillen, Dillon▼, Dyllan and Dyllon. Other suggested similar baby names are Dalle, Dalles, Dalten, Hallen, Mallen, Tallen and Vallen. These names tend to be more commonly used than Dallen.