The Surnames of Ireland by MacLysaght states:
"Little This English name is used as a synonym by translation of Begg, Biggane, Beggane and Petty or Pettit."
"Begg(e) In Leinster this is mainly the epithetic surname of a Norman family formed from the adjective beag (small), as is Bueg in Co. Cork; In Ulster, as Beggs, it is sometimes a variant of the English name Bigge. SIF 15."
"(O) Biggane, Biggins Ó Beagáin and Ó Bigin. This has been largely supersedded in Munster by the English names Little and Littleton (beag, little) Beggan(e) is the Ulster spelling, mainly Co. Monaghan. Biggins is used in Co. Mayo."
"Petty This is basically the same as Petit or Pettitt, which is a much more numerous name. The Petits were early settlers in Meath. The principal Petty family was established in Co. Kerry by the famous Sir William Petty in the seventeenth century. Little, by translation, is a synonym in Co. Wexford."
Littleton This is synonymous with Little in Co. Down and so with Beggane.
My Little Ancestor is Margaret Little, see what I know.
My other Little Ancestor is Martha Little, see what I know.
There are many wonderful links that explain the name Little!
The Clan Little
Clan Little Society, Scotland and Worldwide
Clan Little Society USA Ltd.
SurnameWeb - Little
Little Family Genealogy Forum
If you know more info please email me at firstname.lastname@example.org