the graveyard little one is buried in has rules etc. they ask for some sort of marking to identify the grave. even a small gravestone. for the moment they have put her name there with grave number, age number and date of death.
her mum and i are like best friends and she is asking me for ideas of what to write. she wants me to suggest something. anything. its so difficult. everyone keeps telling her islam doesn't allow it...but she is broken since daughter died. she says she wants a gravestone and it is graveyard rules to have one.
In that case, keep it simple and i guess the example you gave is sufficient, i did not give my comment based on Islam but as what i knew, however i am really sorry for your friends loss and May Allah give both parents and siblings sabar, Aameen.