The strong probability is, that the name was given to this day in honor of the Lord Jesus, and because he rose on that day from the dead.
1 CORINTHIANS 15  Moreover, brethren, I declare unto you the gospel which I preached unto you, which also ye have received, and wherein ye stand;  By which also YE ARE SAVED, IF YE KEEP IN MEMORY what I preached unto you, unless ye have believed in vain.  For I delivered unto you first of all that which I also received, how THAT CHRIST DIED for our sins according to the scriptures;  And that HE WAS BURIED, and that HE ROSE AGAIN THE THIRD DAY ACCORDING TO THE SCRIPTURES:
MATT.12  But he answered and said unto them, An evil and adulterous generation seeketh after a sign; and there shall no sign be given to it, but the sign of the prophet Jonas: For as Jonas was three days and three nights in the whale's belly; SO SHALL THE SON OF MAN BE THREE DAYS AND THREE NIGHTS IN THE HEART OF THE EARTH.
The above scripture says as Jonas was 3 days and 3 nights in the whales belly, and so shall Jesus be 3 days and 3 nights in the heart of the earth. Does good Friday afternoon till (easter) Sunday morning equal 3 days and 3 nights?