AHD derives etymology from Greek:
The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.

matronymic

SYLLABICATION: mat·ro·nym·ic
PRONUNCIATION: mtr-nmk
VARIANT FORMS: also me·tro·nym·ic (mtr-, mtr-)
ADJECTIVE: Of, relating to, or derived from the name of one's mother or maternal ancestor.
NOUN: A name so derived.
ETYMOLOGY: Greek mtrnumikos, dialectal variant of mtrnumikos : mtr, mtr-, mother; see metro– + onuma, name; see n-men- in Appendix I.

Ledasdottir would be a matronymic.

matronym (MA-truh-nim) noun
- A name derived from the name of a mother or maternal ancestor. Also metronym.
[From Latin metr- (mother) + Greek -onym (name, word).] Derive from Latin materia, woody part of a tree, its source of growth. Ultimately offspring of the Indo-European root mater-.
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Have you forgotten? It al derived from Indo-European roots! Emphasis on India, forget the Latin and Greek. Now we just need to trace it further back to Alma Mater - Afrika! And we'll be all right.

In russian language we have the word - mater [transliterated, pronounced [mah-ter',with soft 'r'], meaning - you know what. Other variant is the word - mat'
[transliterated, pronounced [mah-t', with soft 't']. And of course - mama, international first word of almost any child.
Aren't we proud descendants or what?



Viktor V. Trukov

Dear immigrantus: And a baby's first vocalization is name of what it wants most, mamma = breast.

In Spanish, mamar v. to suckle, to suck milk from the breast

In Portuguese, too.

i went searching for the relationship between matronym and mamallian, and at first was stumped, since mamallian end at a latin root 'ma' but looking further, its clear that matronym also goes back to the same root

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from Bartelby's:
mammal
Any of various warm-blooded vertebrate animals of the class Mammalia, including humans, characterized by a covering of hair on the skin and, in the female, milk-producing mammary glands for nourishing the young.
ETYMOLOGY: From Late Latin mammlis, of the breast, from Latin mamma, breast. See m-2 in Appendix I.
OTHER FORMS: mam·mali·an (m-ml-n)
http://www.bartleby.com/61/81/M0068100.html
but when i checked matronmy, i got sent to a different root, (see link below) and got this...
mter-
DEFINITION: Mother. Based ultimately on the baby-talk form m-2,the same root referred to in mamilian with the kinship term suffix *-ter-.
Derivatives include mother1, matrix, and matter.
1a. mother1, from Old English mdor, mother; b. mother2, from Middle Dutch moeder, mother. Both a and b from Germanic *mdar-. 2. alma mater, mater, maternal, maternity, matriculate, matrix, matron; madrepore, matrimony, from Latin mter, mother. 3. metro-; metropolis, from Greek mtr, mother. 4. material, matter, from Latin mteris, mteria, tree trunk (< “matrix,” the tree's source of growth), hence hard timber used in carpentry, hence (by a calque on Greek hl, wood, matter) substance, stuff, matter. 5. Demeter, from Greek compound Dmtr, name of the goddess of produce, especially cereal crops (d-, possibly meaning “earth”). (Pokorny mtér- 700.)
http://www.bartleby.com/61/roots/IE298.html
mter-
DEFINITION: Mother. Based ultimately on the baby-talk form m-2, with the kinship term suffix *-ter-.
Derivatives include mother1, matrix, and matter.
1a. mother1, from Old English mdor, mother; b. mother2, from Middle Dutch moeder, mother. Both a and b from Germanic *mdar-. 2. alma mater, mater, maternal, maternity, matriculate, matrix, matron; madrepore, matrimony, from Latin mter, mother. 3. metro-; metropolis, from Greek mtr, mother. 4. material, matter, from Latin mteris, mteria, tree trunk (< “matrix,” the tree's source of growth), hence hard timber used in carpentry, hence (by a calque on Greek hl, wood, matter) substance, stuff, matter. 5. Demeter, from Greek compound Dmtr, name of the goddess of produce, especially cereal crops (d-, possibly meaning “earth”). (Pokorny mtér- 700.)
http://www.bartleby.com/61/roots/IE298.html