I have to reaffirm what Pilgrim Child said, traditionally the motto should reflect your highest aspirations. This will of course change as you learn and grow. Then also traditionally the name is put into another language such as hebrew, latin, or greek, just to add that subtle hint of mystery. It can be in english if you choose or even pig latin it doesn't matter as long as you take it seriously.
Then some people choose a name that is not intials of a motto but rather a word or name that has a special meaning to you for whatever reason. It is your magick, it is your name, as long as it has meaning to you it will be fine.
Later as you progress as a magician you may come to know the name of your higher self or HGA and later even the name of your divine self. These names will be substituted into your ritual work as well in the N spot but of course you will retain your magical name when dealing with others.
Good luck!
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