What is the heritage of the name "clark"? and also the name "oats"?

Question

these are the names of my biological mother and biological father and i'd like to know what heritage those names come from.

for instance:scottish,english,german,irish.....

Answer 1

This is what www.ancestry.com has to say about the names,

Clark Name Meaning and History

English: occupational name for a scribe or secretary, originally a member of a minor religious order who undertook such duties. The word clerc denoted a member of a religious order, from Old English cler(e)c ‘priest’, reinforced by Old French clerc. Both are from Late Latin clericus, from Greek klerikos, a derivative of kleros ‘inheritance’, ‘legacy’, with reference to the priestly tribe of Levites (see Levy) ‘whose inheritance was the Lord’. In medieval Christian Europe, clergy in minor orders were permitted to marry and so found families; thus the surname could become established. In the Middle Ages it was virtually only members of religious orders who learned to read and write, so that the term clerk came to denote any literate man.

Oats Name Meaning and History

English: variant spelling of Oates.

Hope this helps.

Answer 2

Clark is an occupational name for clerk, scribe, secretary, or a member of a religious order who did such duties.  However, Clark or Clarke can come from various countries.  

Oats or Oates from the English personal name Ode.