Cognomen Senior (Senior 
, Sir 
, Sénior 
) , all around the world, is a common last name. The family name Senior is characteristic of Jamaica, where it is quite a common surname, Guernsey, and Curacao (explore the name in all countries). Measured by absolute frequency, it is commonest in the United Kingdom, Bangladesh, and the United States. Likewise, Senior is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Senior | United Kingdom, Bangladesh, United States, Egypt, Ghana |
| Sir | Myanmar, Bangladesh, Nepal, Taiwan, China |
| Sénior | Portugal, France, Morocco, Democratic Republic of the Congo |
| Senyor | Spain, Morocco, United States, Egypt, Israel |
Harr, Hearra, Heer, Herr, Herra, Herre, Herro, Mesye, Monsieur, Msye, Segnor, Segnur, Seigneur, Seignior, Seignor, Senher, Senhor, Sennor, Senyour, Senyur, Seu, Señior, Señiór, Señor, Sieur, Signora, Signore, Signour, Sinar, Sinaur, Siniard, Sinjo, Sinjur, Sinyo, Sior, Sioro, Sire, Siôr, Sr., Starší, Sènior, Sêniôr, Sêñíõr, Sêňior, Сениор, Старший, סניור, שניאור, سينيور, วุฒยากร, อัฒมาศ, อาวุโส, and โตสมภพ
| gobi, senior johannes (b. 1260) |
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| benedictus de alevelde senior German military leader, DE (b. 1400) |
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| johan van vogelsanck senior politician (b. 1401) |
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| abraham senior Rabbi, banker and politician, ES (b. 1412) |
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| michael praetorius senior (b. 1515) |
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| william selby senior English politician (b. 1532) |
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| elias pistorius senior (1590-1664), CZ (b. 1590) |
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christoph helwig senior German physician, DE (b. 1642) |
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| anton julius busemann senior German politician and jurist (1646-1717), DE (b. 1646) |
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| august müller senior DE (b. 1679) |
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david poe senior IE (b. 1743) |
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johann christian jauch senior DE (b. 1765) |
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| jean-baptiste-joseph le tellier senior FR (b. 1726) |
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| richard cuming senior (b. 1738) |
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georg von borries senior (1811-1870), DE (b. 1811) |
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