The specific poster that you are replying to has not reappeared on these message boards since 2003. You might not get any response from them.
"Ulvild" is probably a farm name from that area. You could expect it to be a residence where the family either lived or had history.
Vuku is/was a parish within Verdal clerical district. It has been spelled in various ways through the years.
Ellef's birth/baptismal record is given in the Vuku parish church books with the exact date listed above. His given name is there spelled as Ellev - but just say it out loud and you'll see that it could be spelled that way.
See the original record of his birth/baptism by going to the following linked pages and he is listed as the last entry on the left hand page.http://www.arkivverket.no/URN:kb_read?idx_kildeid=16407&...
His parents are listed in the third column of information - Elling Larsen of Ulvild farm and Sigrid Mortensdatter. The parish has used pages that were not meant to be used for births/baptisms and just entered changes of purpose in the top of each column. The MOST interesting single item is that Vuku is spelled on the top of that page as "Wuchue" - sounds the same and therefore meaning the same.