God told Adam to replenish the Earth and after the flood told Noah to replenish the Earth. Why would God say to replenish if there were not others before Adam just as there were others before Noah.........just saying!
Genesis 9:1
(KJV) And God blessed Noah and his sons, and said unto them, Be fruitful, and multiply, and
replenish the earth.
(KJV+) And GodH430 blessedH1288 (H853) NoahH5146 and his sons,H1121 and saidH559 unto them, Be fruitful,H6509 and multiply,H7235 and
replenishH4390 (H853) the earth.H776
(YLT) And God blesseth Noah, and his sons, and saith to them, `Be fruitful, and multiply, and
fill the earth;
H4390
מלא מלא
mâlê' mâlâ'
maw-lay', maw-law'
A primitive root,
to fill or (intransitively) be full of, in a wide application (literally and figuratively): - accomplish, confirm, + consecrate, be at an end, be expired, be fenced, fill, fulfil, (be, become, X draw, give in, go) fully (-ly, -ly set, tale), [over-] flow, fulness, furnish, gather (selves, together), presume, replenish, satisfy, set, space, take a [hand-] full, + have wholly.
H853
את
'êth
ayth
Apparently contracted from H226 in the demonstrative sense of entity;
properly self (but generally used to point out more definitely the object of a verb or preposition, even or namely): - (As such unrepresented in English.)
There are two Hebrew words used here to convey the meaning. Putting them together we come up with something like this....
"fill the earth with self"
This is consistent with the words "after their kind"