The new functions in #Excel are useful. The "old" formula to get the last name:
=MID(B5,FIND("*",SUBSTITUTE(B5," ","*",LEN(B5)-LEN(SUBSTITUTE(B5," ",""))))+1,100)
The "new" formula: =TEXTAFTER(B5," ",-1)
We like the second option :)
Another fluffy AI-generated article from @ZebraBI, currently ranking #1 as the "featured snippet" for "Excel weighted average" on @Google. (The screenshot comes from Exceljet, but that's for another day)