Kianni Arroyo, who has made contact with 40 other people born to the same sperm donor father as her (Picture: Kianni Arroyo)

A woman whose father was a sperm donor has tracked down 40 siblings born to the same man, and is sharing her encounters with them online.

Kianni Arroyo, from Orlando, Fl, first began the project five years ago, when she was a high school sophomore.

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She has since discovered four sets of twins, and siblings as far afield as Australia, New Zealand and Canada.

Kianni, 21, is the oldest known sibling born to the donor, with the youngest a baby who is just five months old


Kianni, who works as a waitress, told Metro US: ‘I was raised just by my mom, and she’s always been honest with me about the fact that I was born to a sperm donor.

Kianni with half-sister Joanna, 20. She is the closest sibling in age to Kianni herself and the pair live close to each other in Florida (Picture: Kianni Arroyo)

Kianni pictured with another six of her younger half siblings – including two sets of twins – at a family get-together in Maine in 2015 (Picture: Kianni Arroyo)

Kianni with her half brother Zac. The siblings are close – and Kianni says she has gotten on with all her newly discovered relatives (Picture: Kianni Arroyo)

‘I always wanted to find out more about who I was, and whether I had any siblings, so as soon as I was old enough to access the records I did just that.’



Since beginning her quest Kianni has discovered one half-sister called Joanna, 20, who lives just down the road from her in Tampa, Fl.

The girls, who are the closest half-siblings in age, have become good friends and see each other every other month.

Kianni, who is extremely positive and sunny-minded about her burgeoning family said she always gets on well with new brothers and sisters.

She said: ‘When we meet, we hit it off really quickly and get on really well.

‘Even though we’ve never met before, having a father in common gives us a really special link, and means we feel comfortable with one another.’

Kianni and her mom Ruth. The two women enjoy a close relationship, and Ruth has always supported her daughter’s efforts to track down her half-siblings (Picture: Kianni Arroyo)

Kianni pictured with two of her twin half sisters, Sophia, left, and Ava, right. She has four sets of twin half-siblings that she is aware of (Picture: Kianni Arroyo)

She has even met her dad, and described him as a ‘really cool guy.’ Her father, who prefers to remain anonymous, has met Kianni three times, the most recent encounter being in January.

The first time Kianni and her dad met was during a trip to Universal Studios in Orlando when Kianni was 18, with her mom Ruth joining them.

Touchingly, Kianni’s parents went with her to get her first tattoo during the trip.

Sperm donors are only supposed to provide between 15 and 20 samples, but the company Kianni’s dad worked with, called Xytex, was taken over in a buyout.

Kianni and Joanna with two of their other half-siblings, Maggie and Meredith (Picture: Kianni Arroyo)

Kianni’s siblings Madison, 7, and twins Gracie and Elijah, 3, who live in Australia. She hopes to meet up with them after marrying her partner later this year (Picture: Kianni Arroyo)

Their records were subsequently wiped, meaning he was able to start donating again. Some families who already had one child to him requested another sample, so their children could be full-siblings.

Kianni is getting married to her partner Ryan, 21, later this year and hopes the two can visit some of her half-siblings who live far away.

Around 30 of the 40 half siblings she has discovered are keen to meet her, and Kianni hopes to make contact with them as soon as possible.

She said: ‘I’m an only child, so I get the best of both worlds.

‘I have my mom to myself and all the advantages that comes with that.

‘But whenever I feel like some company, or spending time with family members my own age, having so many half-brothers and sisters gives you more options than most people.’

The world’s most prolific sperm donor is British man Simon Watson, 42, who finds prospective parents through Facebook.

To follow Kianni’s story as she meets her siblings visit https://www.instagram.com/donor_siblings/ or search for @donor_siblings on Instagram