The civilization of the Ancient Egyptians lasted for nearly 3000 years, during which time, the relative importance of different "Neteru" shifted and newer ones became more prominent. These images were used to represent the various aspects of creation, or "Neteru". The "English" names written here have been transliterated (represented by the alphabetic characters of another language)
and are in common use. They were developed by early students of Ancient Egypt as a way of speaking and writing about what they found written on papyrii and in stone on the walls of tombs and temples. The original Egyptians did not include the vowel sounds (a, e, i, o, u,) in the heiroglyphic language, apparently to keep secret the actual pronunciation of powerfull magical statments. Since we cannot pronounce words without vowels, Egyptologists have added vowel sounds and letters that suit their preference and national language.
Some hieroglyphs were pictorial; symbols or figures specifying the range of uses or meaning. Others were phonetic, called phonograms, and represent sounds. There are three types of phonograms, a monolateral, which stands for the sound of one letter, a bilateral, which stands for the sound of two letters and a trilateral, which stands for the sound of three letters.
For example the heiroglyph
consists of two phonograms (r and ã, both consonant sounds) and a pictorial (the solar disc) indicating that the word means "sun".
It is written as Ra
in English and in German.
What it really sounded like is anybody's guess.