Hallo Carlos, When you wanted help, the people they (will) help you needed more information.
First there where absolutly more than one Friedrich Krul(s) Its easyer that you kowe , birthday, place or parents.
The most immigrants left Germany true Hamburg or Bremen.
Than ist there the important question is there a coat of arms from your three off the Kruls.
Not evry family has a coat of arms.
Even in one family its posible that only one familymember has the coat of arms and the others can use it.
There are on the internet specialsite's for coat of arms maby you can "aske " there to.
I wil giff you a advice where you not asked for;write in smal letters and write in the more please and when sombody help way. It looks better end sounds nicerthen when you write : I NEED THE in big letter its the seem as screaming andit looks like e matter from live and dead.
When you knowe a bit more about you Frederich i will look for you on mi list I have several Friederichs, Greetings from Holland Betty Krull