Orion is a rare first name for men but a somewhat popular last name for both adults and children (#97848 out of 150436, Top 65%). (2000 U.S. Census). Charted below is the baby name popularity of Orion for boys. Orion reached its top rank of #383 in the U.S. in the year 2014.
Et al. is most commonly found in scholarly writing, especially when used to avoid having to list a number of different authors in a bibliography or footnote. You can use it when describing the people who came to a dinner party, but it may sound rather odd.
etc. is the proper abbreviation of et cetera. For those who remain doubtful, please examine the proper spelling of the full version and note that the abbreviation is simply the first three letters, the most common method of abbreviating. The Ect. answer is simply wrong, though it is very common. It is based on a very common misspelling of et cetera. Abbreviations are not created by re-ordering the letters of the original.