You have a new web page and it has a blog section.
Should your posts from another blog be put in your new web page blog?
Remember, a web site is a selling site so what you put there in a blog must be relevant to what you offer and resonate with your ideal target audiences as "Hey thats me-I need to read this".
If most of your existing articles/posts placed on other sites or blogs are not really related to what you and your services/product is about in the new web site, DONT re-post or put them on your web page blog section.
It will water down the value of your blog to your ideal target audience readership and not enhance your reputation nor value to that target audience.
If any do fit, post them one at a time so it creates buzz, shows weekly added resources from you and,because of that ever increasing source of relevant information encourages folksto sign up, regularly read and even join into the conversations.
Remember, "selling" so you can acquire paying customers and a "go to" reputation amongst your ideal target audiences is the objective of a web site so the blog there should help you do ONLY that.
Thus, unless articles by you elsewhere do that, don'tinclude them or post them at all into your new web page blog section. Neil Licht