Lion Do is a combination of Moo Lim Do and Tang Soo Do. Considering that Moo Lim Do itself is a combination of Taekwondo, Tang Soo Do, and Hapkido, you might say that Nevin teaches Moo Lim Do but with a greater emphasis on the Tang Soo Do aspects of it.
All of the above are Korean styles.
Nevin is a 3rd Degree Black Belt in Moo Lim Do. Since what Nevin teaches is not strictly Moo Lim Do (because of the Tang Soo Do additions), it is being called Lion Do.
There is very little difference between Lion Do and the LMA that John Pratt teaches. In fact, we intend to merge them in the future.
English: Lion Do
In English, the word "do" is a verb (with conjugations of "does", "did", done", etc.), and it means "to bring to pass; carry out; bring about; effect; perform". Thus, "Lion Do" is an English-language idiom for "bring to pass the way of the Lion", or "bring about the lion", or "the way of the lion".
The Lion symbolizes majesty, courage, strength, protection, family, wisdom, valor, and other admirable traits. It also has special meaning to us. In addition to a representation of the Israelite Tribe of Judah, the lion is also used as a representation of the entire house of Israel, which in turn is a representation of the God's people. Thus, saying "the way of the lion" is also saying "the way of the God's people".