Baby’s first tooth

How old were your babies when they got their first tooth? My son will be 8 months on the 16th and still no teeth yet. It seems like I see a white part on his gums but it’s been there for 3-4 months. I know it’s all about genetics when a baby’s tooth will cut through but my husbands first tooth was between 7 and 8 months and I am not sure when mine was. Just wondering.