Strong’s Greek
G3722 — orthros
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ὄρθρος
orthros — pronounced or'-thros
from the same as 3735; dawn (as sun-rise, rising of light); by extension, morn:--early in the morning. see GREEK for 3735
2 occurrences in the KJV.
Luke 24:1
Now upon the first day of the week, very early in the morning, they came unto the sepulchre, bringing the spices which they had prepared, and certain others with them.
John 8:2
And early in the morning he came again into the temple, and all the people came unto him; and he sat down, and taught them.