Angele qui custos mei es, care custos mei, cui Dei amor hic me commendat. Semper in hoc die a latere meo es, ut me illumines, ut defendas, ut regas et gubernes. Amen.
Ilisahihishwa au kuhaririwa mwisho na Aneta B. - 17 Agosti 2011 13:46
Yes, of course, it can be "mei custos", dear. It means exactly "guardian of me". However, if we wanted to say simply "my guardian" in the Nominative it would be "custos meus" in the Vocative - "custos mi". Both forms "mei custos" and "custos mi" are correct.
But the English source reads: "Guardian angel my guardian dear" not "Angel, who are my guardian..." (Angele qui custos mei es...)
That's why I suggested: "Angele custos mi, custos care mi"
Of course it can be also "Angele mei custos , mei custos care", but your version just contains something more what I can't find in the source above: ("qui custos mei es" ).