Loosely speaking, an algorithm is a step by step recipe of solving a problem.
Algorithms in mathematics are ubiquitous. Can you calculate 123 + 23? Yes, you can do so because you learnt an algorithm to do so in primary school.
Algorithms are a lot of fun. An interesting (and very approachable) book on algorithms is "Algorithms Unlocked" by Thomas Cormen.
But this thread is about getting suggestions, so that he knows what is the best to name himself.
Einar is not an unique name. There are people named Einar. We are looking for unique names, like Agnishom. There was no one called Agnishom before me.
How do you pronounce Einar?