5. The name Rana ought to mean 'frog'. At the star Deneb Kaitos Allen has written:

"... Very differently it was the Arabs' Al Difdi' al Thānī, the Second Frog, that we see in the present Difda, Latinized as Rana Secunda; the star Fomalhaut being Al Difdi' al Awwal, the First Frog."

And at Fomalhaut:

"Among early Arabs Fomalhaut was Al Difdi' al Awwal, the First Frog, and in its location on the Borgian globe is the word Thalīm, the Ostrich, evidently another individual title."

If the year is divided in two parts (Sun present respectively Sun absent) then there should be two 'frogs' (= beginnings).

A frog is capable of going both in water and on land. At the beginning it has no arms and no legs but later they will develop. Before this has occurred it cannot move up onto land.

In ancient Egypt the frog was used as a symbol for rebirth and the tadpole signified 100,000:

I have copied this picture from Richard H. Wilkinson's Hieroglyfernas värld ('Reading Egyptian Art'). It comes from the back side of the ceremonial chair of Tutanchamon. The sitting person in center is the God of Eternity and he is sitting on a sign for gold (or for feast).

At the ends of his outstretched arms are stylized palm branches with scores to represent the years. At the bottom of each such palm branch is a tadpole sitting on a sign representing eternity. At the beginning of eternity there are tadpoles and a human embryo 6 weeks old does look much like a tadpole: