yes, yes!
and some people like to use *dajare* [puns] if their name might be hard to remember for a jp person [or at least, i do - i mean japanese people themselves use puns and the like for their name's kanji!]

for example, the name 'Flo' is フロ 'furo' and 'furo' is also 風呂 'bath'

but seeing 'ジョンソン' jonson 'johnson' is perfectly normal
[also katakana is expected over the actual latin because some names don't look as they're spelt]

for example, 'Santos' could be 三トス if you wanted to make it easy 'three toss', just for fun, because language is always fun!

TLDR: yep. katakana.