AusDesi
SPNer
In the 1960's. many Punjabi Hindus of the Khatri Caste got at least one son raised as a Sikh. And Today, 3rd generation from these hybrids are dedicated sikhs. To my knowledge this practice amongst Hindus goes back since the early 1900s.
That is still followed. Not sure of the correct word but my mum tends to call them 'manotie' as in kids who are sikhs because of oaths(manot is the word in punjabi i guess). Usually an elder in khatri households goes and takes an oath at the gurudwara that if the first born is a Son then he will be raised as a Sikh.
In my town roughy 20-30% of Khatris are guru sikhs and the rest of Khatris give Gurudwaras an equal status to Hinduism.