Thank you for your question and welcome to ADHDCentral.com.   It would be impossible to determine if your son has ADHD. Most doctors are hesitant to diagnose a child at this age for several reasons. One reason is that a diagnosis of ADHD must cause some impairment and it would be impossible to say at this point if your child is impaired in any way. Another reason would be it is impossible to receive feedback from your son on how he feels or what he is thinking at this age. There are other reasons as well as these.   ADHD does tend to run in families, so it is not a coincidence that your sons and their father have ADHD.   For more information:   ADHD: Birth to 12 Months   ADHD in Toddlers   Eileen