The X-Men mutant better known as Wolverine, who heals from almost any wound and has metal claws that spring from his hands. Hugh Jackman played him in the films, including Logan (2017).
In mainland cinemas the 2017 film Logan was not called 罗根 at all: it opened as 金刚狼3, 'Wolverine 3'. Taiwan kept the name as 羅根.
memory
Both characters carry their literal meanings in the background - 罗 'net' and 根 'root' - but here they're chosen purely for sound. Treat 罗根 as a phonetic shell, not a meaningful compound.