An “only-one-owner” logo with your own addition should have a personal reference to the recipient or to yourself:
What does he/she/I particularly like? What is special about his/her life?

What do you think of spontaneously or deliberately about yourself or someone else? No matter what…
In the end it will be unique! Only the person receiving the gift will have it in this form and that makes it particularly special.

Let yourself be inspired by the following suggestions:
(no guarantee that these are still available)

e.g. 5-6 initial letters of special sentences and mysterious messages:
# i L v b z T # – united in love, until death
# a g D s 3 # – all good things come in threes
# w m k v e n # – whoever kisses me will not forget
# D j D i l D # – You, yes you, I love you
#d A i d L # – the moment is life
# i m m d W f # – I clear my path
# d f V h S # – the early bird has trouble sleeping
# d G g u s # – the connoisseur enjoys and is silent

First letters of mantras and suggestions
(I/me/my statements: all planned as NFT)
#isawiw# – I create everything I want
#ibewM# – I am a valuable person
#mgegbg# – I am doing particularly well
#dZhmW# – time heals my wounds
#ewwidm# – it becomes what I make of it
#itnim# – I don’t dream, I do
#aigawb# – everything is good, everything will be better
#elamzv# – it’s up to me to change
#ilmwib# – I love myself as I am
#ilmeL# – I live / love with a smile
#mTheT# – my dream has an appointment
#inBsss# – I use encounters, they are meant to be
#ibeslM# – I am a very lovable person
#ibet# – I am simply great
#Zenzs/b/a# – time to…. something new start / begin / to start
#eSnda# – one step at a time
#dWimZ# – the path is my goal
…….

Coordinates
birthplace
Meeting place / wedding place / other special place
Favorite city
Famous big cities or countries (Berlin, Paris, London, Milan, Stockholm, Hong Kong, Japan, Australia etc.)
Place and street of my home, -first kiss, (first) night of love
……

Numbers
of special days/dates such as birth -wedding -divorce -special time
Lucky numbers
Numbers for letters (higher 10 = cross sum)
……

Characters of other languages, such as:
Chinese
Indian
Cyrillic
Greek
Arabic
Hindi

e.g. for beautiful words such as: the sun, life, love, live, meaning, freedom, life, peace, the best, the best, the best….. (each with or without an article) are great additions!