Harrison Name Meaning
English (northern): from the Middle English personal name Harry or Herry + -son. These were the common pronunciations of Henry (see Harry ).
Harry Name Meaning
English (mainly south Wales and southwestern England): from the medieval personal name Harry a common form of Henry with assimilation of -nr- to -rr- and regular Middle English change of -er- to -ar-. In south Wales the surname is generally a post-medieval coinage in most cases not hereditary until the 18th or 19th century. French: from the ancient Germanic personal name Hariric composed of the elements hari heri ‘army’ + rīc ‘power(ful)’. Native American (e.g. Navajo): adoption of the English personal name Harry (see 1 above) as a surname.
Source:
Dictionary of American Family Names 2nd edition, 2022
Similar surnames:
Harbison, Harmison, Harris, Garrison, Marrison, Harvison, Hardison
From: https://www.ancestry.co.uk/learn/facts