Root — English, Welsh, and Irish
Meaning — From the personal name Piers, the usual Norman vernacular form of Peter. In Wales this represents a patronymic ap Piers. In Ireland it represents a reduced Anglicized form of Gaelic Mac Piarais 'son of Piaras', a Gaelicized form of Piers.

Root — 1. English, 2. Northern German
Meaning — 1. (London): patronymic from the personal name Piers, 2. Patronymic from the personal name Pier, a variant of Peer, reduced form of Peter

Root — English
Meaning — Topographic name for someone who lived by a hill with a sharp point, from Old English pic 'point ', 'hill', which was a relatively common place name element. English: metonymic occupational name for a pike fisherman or nickname for a predatory individual, from Middle English pike.

Root — (researching)
Meaning — (researching)

Root — (No information found)
Meaning — (No information found)

Root — Greek, Latin & also the German variant of Poppe
Meaning — Papa, father.

Root — English
Meaning — 1.) topographic name for someone who lived by a postern gate, from Old French posterne; in some cases it would have been a metonymic occupational name for a gatekeeper. 2.) Habitational name from Poston in Herefordshire or Poston in Shropshire, which is named with an Old English personal name Possa +  ¬orn, thorn tree.

Root — 1. English (of Welsh origin), 2. Irish
Meaning — 1. Anglicized form of Welsh ap Hywel 'son of Hywel', a personal name meaning 'eminent'. 2. Mainly of Welsh origin as in 1, but sometimes a surname adopted as equivalent of Gaelic Mac Giolla Phóil 'son of the servant of St. Paul'.

Root — 1. Irish (chiefly County Down, 2. English.
Meaning — 1. Variant of Prey, 2. Topographic name for someone who lived by a meadow, from Middle English pre(y), Old French pree 'meadow', or a habitational name from any of the minor places deriving their name from this word, of which there are several examples in Surrey.

Root — Welsh & English
Meaning — Welsh:  Anglicized form of Welsh ap Rhys 'son of Rhys'. This is one of the most common Welsh surnames. It has also been established in Ireland since the 14th century, where it is sometimes a variant of Bryson.  English:  the name is also found very early in parts of England far removed from Welsh influence, and in such cases presumably derives from Middle English, Old French pris 'price', 'prize', perhaps as a metonymic occupational name for a fixer of prices.

Root — Welsh
Meaning — variant spelling of Pritchard. Anglicized form of Welsh ap Rhisiart 'son of Richard'.

Root — English (Dorset)
Meaning — of uncertain origin; perhaps a variant of Pocket(t), from a diminutive of Anglo-Norman French poque small pouch , hence a metonymic occupational name for a maker of purses and pouches or a nickname. Alternatively it could be from a diminutive of Middle English pouk(e) 'evil spirit', 'puck', 'goblin'.