One of their fathers is too distraught to name all the dead -- two related families, one of which had gone to visit the other.

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As one of the fathers of European humanism, he gave his name to a university in his native Rotterdam, to a programme that helps young Europeans study abroad and to a controversial way of pronouncing Greek.

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It has been traditional in England for children to take their father's name and so Professor Sykes and colleague Catherine Irven looked at the Y chromosome, which fathers pass to sons but not daughters.

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