There is no right or wrong answer to this question. It’s a very personal thing. Many people feel that sharing their own first name is fine, but the names of their children are off limits. Others feel that all names and even photos should be carefully guarded. On the other hand, some people use their blogs as a way to share information with family and close friends and therefore show pictures and share names freely. It’s a matter of what you are comfortable with.
Please be aware, however, that the Internet is not private. Your photos and names are very much public and searchable for those people who may or may not have noble intentions. I write this not to intimidate anyone, but only to make you aware.
Bottom line: Only you can decide how much information you want to share. Consider carefully who you are sharing it with and how it will be used.